To see the other types of publications on this topic, follow the link: Rock composition.
Dissertations / Theses on the topic 'Rock composition'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Rock composition.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Jackson, Chtaura. "Factors Influencing Macroinvertebrate Diversity and Community Composition in Riverine Freshwater Rock Pools." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2311.
Full textAbstract:
I examined a system of 378-riverine rock pools situated along the James River in Richmond, Virginia, to uncover the factors influencing their macroinvertebrate diversity and community composition. I characterized (total = 60) the physical characteristics, water quality, hydrology, and community assemblages in July 2009 for a subset of pools. I examined whether selected environmental factors (pH, nearest neighbor distance, depth, surface area and inundation height) were related to macroinvertebrate diversity and community composition. Species richness and total abundance of all taxa increased with pool pH and surface area. Ordination indicates that nearest neighbor distance (NND) and pH varied significantly among pools. My findings indicate that macroinvertebrate diversity in this rock pool system were mainly related to the surface area, pH and NND.
2
Rochelle, Christopher Alyn. "Fluid-rock interaction in the Mirvalles geothermal field, Costa Rica : mineralogical and experimental studies." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277906.
Full text
3
Peringer, Patrick Edward. "Babel: a Composition for Rock Band, Soprano Quartet, and Chamber Ensemble—music and Critical Essay." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700023/.
Full textAbstract:
Babel is a work for rock ‘n’ roll band (two electric guitars, electric bass, drum set), four soprano singers, and a twenty-one instrument mixed chamber ensemble. The 50-minute composition is based on the Tower of Babel story in Genesis 11:1-9, and the four-movement structure is derived from the form of this narrative. The first movement, “building rebellion,” establishes man’s intent to build a grand city and tower in a rebellion against God, while the second movement, “seeing/coming down,” describes the all-seeing God’s knowledge of man’s rebellion and God’s descent to the city. Movements three and four, “confusion” and “scatter,” depict the actions of God, confusing humankind’s language and scattering him over the earth. This project fuses rock ‘n’ roll influences with contemporary classical improvisation, creating a work that is sonically and dynamically excessive. One compositional goal was to use small amounts of material as the impetus for directed improvisation, which would be developed to create intricate and evolving textures. Each movement’s score is confined to a single page of music per part, necessitating highly graphic and aleatoric notation. The musical history and musicianship of each player greatly shapes the sonic outcome of Babel. Rigorous structure was mixed with extra-musical associations to create intricate layers of musical and metaphorical meanings. Every decision regarding form, pitch, rhythm, and improvisatory state is linked to a meaningful mathematical, philosophical, or theological idea. Out of the intention to illustrate a multi-layered, Biblical text interpreted in vastly different ways, came a complex work of art that challenges, yet welcomes, performers and listeners of all kinds.
4
Whitehead, Benjamin. "The oxygen isotope composition of the country rock of the Koegel Fontein igneous complex." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29636.
Full textAbstract:
The Koegel Fontein Complex is a Cretaceous anorogenic complex located in southern Namaqualand, west of Bitterfontein, South Africa. The complex comprises a large granite intrusion (the Rietpoort Granite), a series of NW-striking quartz porphyry dykes, and numerous other minor igneous bodies. A breccia plug, and the quartz porphyry dykes have δ18O values as low as -4.1‰, and these are believed to be the result of selective dehydration and melting of previously 18O-depleted rock (Curtis et al., 2013; Olianti and Harris, 2018). This thesis investigates the oxygen isotope composition of the country rock of the Koegel Fontein Complex, which consists of Namaqua-Natal Belt granulite facies rock and minor remnants of overlying Gariep Supergroup metasedimentary rock. The Brak Fontein Shear Zone (BFSZ) is investigated as a protolith for low δ18O (<6 ‰) units of the Koegel Fontein Complex. Geological mapping combined with oxygen isotope data of the country rock confirms that 18Odepletion occurred prior to the emplacement of the Koegel Fontein Complex and is localised in the ~545 Ma BFSZ. Generation of rock with δ18O values as low as -4 ‰ requires a combination of high temperature water-rock interaction, a high water-rock ratio and very low δ18O values in the alteration fluid. Deformation in the BFSZ coincides with the Pan-African Orogeny and a 549-545 Ma global glaciation, and it is reasonable to assume that ambient meteoric water had a very low δ18O value, perhaps as low as -30 ‰. Assuming a possible Δrock-water range from 0.5 to 2.8, a δ18O value of 8‰ for the rock before alteration, a δ18O value of -2‰ for the rock after alteration, a δ18O value of -30‰ for the fluid before fluid-rock exchange and exchange at a temperature range of 400°C to 700°C, a waterrock ratio of ~0.31 to ~0.40 is required to create the observed 18O-depletion in the BFSZ. The calculated water-rock ratio suggests that a significant amount of meteoric water passed through the BFSZ, into the brittle-ductile transition zone. A cold climate only coincides with a suitable tectonic setting during the Pan-African Orogeny, suggesting that the 18O-depletion is syn-tectonic. Furthermore, strong recrystalisation and annealing after deformation and a lack of brittle overprint or cross-cutting fractures and/or veins suggest a low permeability in the BFSZ after the Pan-African deformation. Therefore 18O-depletion in the BFSZ must have occurred during the Pan-African Orogeny and may be evidence for the infiltration of meteoric water into the ductile crust, possibly requiring variable strain rates or seismic pumping.
5
Hettula, J. (Jesse). "Hydrothermal alteration and host rock composition of the Pyhäsalmi volcanogenic massive sulphide deposit, Central Finland." Master's thesis, University of Oulu, 2019. http://jultika.oulu.fi/Record/nbnfioulu-201911233182.
Full textAbstract:
Abstract. The Pyhäsalmi volcanogenic massive sulphide (VMS) deposit begins at ground level and reaches a depth of 1420 m. For the first 1050 m, the massive sulphide is formed of long a long conical sheet-like structure, which is slightly sloping to the west and steeply downward, forming a north–south planar massive sulphide deposit that narrows with increasing depth. Between 1050 and 1420 m, the structure of the deposit resembles the shape of a potato, which is connected to the upper deposit by a small contact area in between these two shapes. The upper and deep ore bodies are significantly different in shape, but both are enriched with Zn and Cu. VMS related hydrothermal alteration is present on the eastern side of the deposit, meaning that the east was, at the time of deposit formation, the footwall. Similarly, hydrothermally unaltered western side of the deposit is the hangingwall. Both the footwall and hangingwall are dominated by a homogeneous and aphanitic felsic rock unit, which has hydrothermally altered in the footwall into sericite schist. In both footwall and in hanginwall, mafic units are more common with increasing distance from massive sulphide. In total, when compared to hangingwall, the footwall has older and more numerous mafic intrusions, but both share pegmatitic granite intrusions in equal measure, which are a byproduct of latest local tectonic event. Nearly all the rock types have undergone severe alteration due to hydrothermal or/and metamorphic events, leaving no primary textures intact.
During the summer of 2017, all the data relevant to this study was collected from seven drillcores which collectively represent the footwall, hangingnwall and deep massive sulphide itself. Pyhäsalmi Mine Oy provided all their previously collected geochemical and geophysical data from these drillcores. Most of this data portray the footwall rock units and massive sulphide base metal content. In addition, whole-rock geochemical data and thin sections were collected from the hangingwall and from silicic inclusions in deep ore body for better overall view of the deposit. These seven drillcores were also logged, photographed and systematically measured for their geophysical properties, such as specific gravity and susceptibility. Subsequently, 55 thin sections were selected from collection of samples, which display the relevant major rock types and gradual increase in hydrothermal alteration intensity in host rock.
The purpose of this thesis is to describe most relevant properties of Pyhäsalmi VMS deposit and its host rock, based on the seven drillcores and data collected from them. As a result, geochemical studies have proven to be and irreplaceable tool for clarifying the host lithology and drillcore logging, measuring the intensity of hydrothermal alteration and estimating absolute mass transfer during hydrothermal alteration. It is evident that the footwall felsic host rock consists of two chemically different felsic volcanic units, which are named here Rhyolite 1 and 2. Lithologically Rhyolite 2 is atop Rhyolite 1, and it is also associated with massive sulphide related hydrothermal alteration. In hangingwall, the felsic host rock is solely composed of unaltered Rhyolite 2. Similarly, numerous mafic intrusion and layers are geochemically divided into three major groups, of which Andesites and Basaltic andesites belong to the footwall, whereas the third group, Basalt, belongs exclusively to hangingwall. The practical utility of geophysical data for ore exploration, measuring hydrothermal alteration intensity and rock type identification was also estimated. It seems that specific gravity was most useful of the three properties, however it could only indicate correct answers in all studied categories.Pyhäsalmen vulkanogeenisen massiivisen sulfidimalmin isäntäkiven hydroterminen muuntuminen ja koostumus, Keski-Suomi. Tiivistelmä. Pyhäsalmen vulkanogeeninen massiivinen sulfidi -esiintymä (VMS) alkaa maan pinnalta ja yltää 1420 m syvyyteen. Muodoltaan esiintymä koostuu ensimmäisen 1050 m matkalta pitkästä tasomaisesta rakenteesta, mudostaen hieman länteen ja jyrkästi alaspäin suuntautuvan, pohjois-etelä suunnassa tasomaisen massiivisen sulfidiesiintymän, joka kapenee syvyyden kasvaessa. Välillä 1050–1420 m, esiintymän rakenne muistuttaa muodoltaan perunaa, joka on vain pieneltä alalta kosketuksissa sen yläpuolella olevaan esiintymään. Malmimuotojen perusteella Pyhäsalmen VMS on jaettu ylempään malmiin ja syvämalmiin. Ylempi ja syvämalmi ovat malmikerrostumaltaan huomattavan erilaiset, vaikka molempiin on rikastunut Zn ja Cu. VMS esiintymälle tyypillistä hydrotermistä muuntumista ilmenee esiintymän itäpuolella, mikä tarkoittaa, että se oli esiintymän muodostumishetkellä jalkapuoli. Esiintymän hydrotermisesti muuntumaton länsipuoli on taas vastaavasti kattopuoli. Sekä jalka että kattopuolta dominoi massiivisen sulfidiesiintymän läheisyydessä homogeeninen ja hienorakeinen felsinen kivilajiyksikkö, joka on hydrotermisesti muuntunut jalkapuolessa serisiittiseksi liuskeeksi. Paikoin dominoiva kivilaji on maafinen, mutta vain syvemmällä jalkapuolessa ja korkeammalla kattopuolella. Jalkapuolessa ilmenee useampia vanhoja intruusioita kuin kattopuolessa, mutta molemmissa ilmenee viimeisimpien tektonisten tapahtumien seuraamuksesta tuoreempia pegmatiittisia graniittijuonia. Lähestulkoon kaikki kivilajit ovat joko/sekä hydrotermisen tai/ja metamorfisen muuntumisen yhteydessä muuntuneet niin voimakkaasti, että kaikki primääriset rakenteet ovat tuhoutuneet.
Pyhäsalmen VMS esiintymästä kerättiin dataa vuoden 2017 kesänä seitsemästä eri kairansydämestä, jotka yhdessä edustavat kattavasti esiintymän jalka ja kattopuolta sekä syvämalmia. Pyhäsalmi Mine Oy luovutti kaiken aikaisemmin kerätyn geokemiallisen ja geofysikaalisen datan tätä tutkielmaa varten, mikä oli jo kerätty ennen tämän tutkielman alkua näistä kairansydämistä. Suurin osa tästä datasta kuvasi jalkapuolta ja kairansydämmissa esiintyvän massiivisen sulfidien perusmetallien pitoisuuksia. Tämän lisäksi, kattopuolesta ja syvämalmin silikaattisista inkluusioista kerättiin lisää geokemiallista dataa ja ohuthieitä paremman kokonaisuuden hahmottamiseksi. Tämän datan lisäksi nämä seitsemän kairansydäntä logattiin, valokuvattiin ja säännöllisin väliajoin niiden geofysikaaliset ominaisuudet, kuten ominaispaino ja suskeptibiliteetti, mitattiin. Jälkeenpäin 55 ohuthiettä valittiin, jotka näyttävät esiintymän pääasialliset kivilajit ja asteittaisen hydrotermisen muuntumisen voimakkuuden kasvun.
Tämän tutkielman tarkoitus on kuvata oleellisimpia Pyhäsalmen VMS esiintymän piirteitä ja sen isäntäkiven ominaisuuksia, käyttäen näitä seitsemää kairansydäntä ja niistä kerättyä tietoa. Geokemialliset tutkimukset ovat osoittautuneet korvaamattomaksi työkaluksi esiintymän isäntäkiven litologian selvittämiseen, hydrothermisen muuntumisen intensiivisyyden mittaamiseen ja hydrotermisen muuntumisen yhteydessä tapahtuvan massasiirtymisen arvioimiseen. Jalkapuolen isäntäkivi koostuu kahdesta kemiallisesti toisistaan poikkeavista felsisistä vulkaanisesta kivilajista, jotka on täällä nimetty Ryoliitti 1:ksi ja 2:ksi. Litologisesti Ryoliitti 2 on 1:sen yläpuolella, ja jalkapuolessa Ryoliitti 2 assosioidaan hydrotermisen muuntumisen kanssa. Kattopuolen felsinen vulkaaninen isäntäkivi koostuu yksinomaan Ryoliitti 2:sta. Vastaavasti, lukuisat mafiset intruusiot ja kerrostumat jakautuivat geokemiallisesti kolmeen pääryhmään, joista Andesiittit ja Basalttiset andesiitit kuuluvat jalkapuoleen, ja Basaltti kuulluu yksinomaan kattopuoleen. Geofysikaalisen datan käytännön hyödyllisyyttä on myös arvioitu kivilajiluokittelun yhteydessä käytettäväksi työkaluksi ja hydrotermisen muuntumisen voimakkuuden arvioimista varten. Ominaispaino osoittautui hyödyllisimmäksi geofysikaaliseksi ominaisuudeksi kaiken kaikkiaan, mutta se pystyi parhaillaan vain osoittamaan oikean vastauksen suuntaan niissä tehtävissä missä sitä testattiin.
6
Mönicke, K. Annett. "Fluids in systems of natural rock composition at ultra-high pressure metamorphic conditions an experimental approach /." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971472327.
Full text
7
Purchase, David Bryce. "Patterns of distribution, abundance and community composition of rock pool fishes in Goukamma Nature Reserve, South Africa." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28158.
Full textAbstract:
Rock pools can be found in most rocky intertidal marine environments across the globe. Despite the vast body of literature describing the organization of ecological communities and biota inhabiting the greater rocky intertidal, very little effort has been given to rock pools. As a result they are far less understood than the adjacent emergent intertidal, particularly with respect to their fish communities. This is mostly due to the relative small size of rock pool fishes, their cryptic behaviour and morphologies, the relative difficulty in sampling intertidal fish utilizing conventional methods, and the low economic value of rock pool fishes. Rock pool fishes may have significant ecological value, as they are involved in structuring intertidal communities. Due to reduced environmental fluctuations within rock pools, these habitats may serve as crucial refuges from adjacent stressors. Furthermore, rock pools may play an important role in the early life histories of sub-littoral fish species that utilize these habitats as juveniles, some of which are valuable to fisheries as adults. It has been suggested that due to the lack of exposure at low tide, rock pools do not represent a true intertidal habitat, as organisms are not subject to the full range of environmental fluctuations seen in adjacent habitats. There is unequivocal evidence indicating that, like the surrounding emergent substrata, conditions in rock pools are highly regulated by the tidal cycle and that the degree of environmental fluctuations will vary greatly with intertidal height and degree of exposure of individual pools, much like patterns seen in adjacent habitats. Fishes inhabiting rock pools can be broadly categorised into groups based on their major zoographic provinces, life history traits and their behavioural affinities, on top of basic taxonomic categorizations. Global patterns indicate two main rock pool fish communities, those of Gondwanan origin and those of Laurasian origin. South African rock pools are relatively well studied from a taxonomic perspective compared to elsewhere, however, like the rest of the globe, factors influencing their fish communities are far less understood. The aim of this study was to determine which, if any, physical and biological rock pool characteristics have any significant influence on the Abundance, Diversity and Community of fishes at Goukamma MPA, South Africa. This site was chosen due to a lack of previous surveys of rock pool fishes at this site and because of a need for an inventory of faunal communities in protected areas in South Africa. The shoreline within the reserve is dominated by sandy shores and interspersed with mixed rock-based habitats. Aelonite platforms form mixed shores and are found along areas west of the Goukamma estuary. Hard, predominantly older Table Mountain Sandstone layers are found along the eastern shore near Buffalo Bay. Rock pools are found at both shore types. Aelonite platforms were formed geologically recently from sand dunes formed during the interglacial periods of the Pleistocene and as a result are relatively flat and easily eroded into circular pools by loose rocks. The hard table mountain sandstone pools formed in cracks and faults caused by geological tilting action, and tend to long and thin rather than circular. Fifty-five rock pools were sampled, to investigate the influence of spatial (Location and Headland), temporal (Season), abiotic (Area, Height, Depth, Rugosity) and biological (Rock, Algae,) characteristics of rock pools on the distribution, abundance, diversity and community composition of rock pool fishes. A total of 747 fishes, representing seven families and 16 species were collected, using a non-lethal anesthetic, clove oil. Clinus cottoides, Parablennius cornutus and Caffrogobius caffer were the most dominant species, together making up almost 85% of the fish community. Total fish Abundance was not found to significantly change with any of the variables. The Shannon-Wiener Species Diversity Index for the whole of Goukamma was 1.64, however, it differed significantly among Locations, was greatest in pools of larger Area, lower Heights and higher cover of Rock. Community was found to significantly change with Location and was significantly influenced by Area, Rugosity, Height and Depth. Rock pool fish communities in South Africa show clear biogeographical patterns. These patterns show five distinct bioregions along the South African coastline in that familial distributions tend to be broken by the same oceanographic barriers seen in the distributions of many other marine taxa. The results suggest that rock pool fishes tend to exhibit distinct preferences to pools of certain typology and will seldom move over even small distances in search of new pools. Overall the study followed past findings from studies of similar type, both within South African and elsewhere.
8
O'Regan, Jade Simone. "When I Grow Up: The Development of the Beach Boys’ Sound (1962-1966)." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/367243.
Full textAbstract:
The Beach Boys are an American rock group whose career has spanned over fifty years. However, it was between 1962 and 1966 that the group had most of their chart success and that their unique ‘sound’ was crystallised. This study takes a broad, big- picture overview of the Beach Boy’s repertoire from this period and charts the development of their sound through the apprentice-craft-art (ACA) framework.
The concept of a ‘sound’ is able to draw together the musical, technological, sociological and historical elements that, when combined, create the sound of the Beach Boys during the 1962-1966 period. The flexibility of this concept means that areas often overlooked in popular music studies and in studies on the Beach Boys in general (particularly the roles of production and instrument types), are able to be woven into analyses of more traditional musical elements (such as song structure or chord progressions).
To investigate their sound, this study analyses song structure, rhythmic feels, instrumentation, chord progressions, lyrical themes and vocals from 101 songs that the Beach Boys released on nine studio albums from the 1962-1966 period. The aim of these analyses is to give a detailed understanding of how the Beach Boys’ sound developed over time. Included in these musical analyses is a discussion of instrument types and production styles, which also have an impact on the Beach Boys’ sound. Musical findings are contextualised with important socio-cultural considerations that also contribute to the Beach Boys’ sound, such as their home in Southern California, their complicated personal histories, their relationship to surf music, and the construction of their “California myth”. The combination of the musical, the social and the historical gives a cohesive understanding of the way they constructed their sound.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy (PhD)<br>Queensland Conservatorium<br>Arts, Education and Law<br>Full Text
9
Hanna, Teresa Rae. "Areal Extent and Volumes of the Dinner Creek Tuff Units, Eastern Oregon Based on Lithology, Bulk Rock Composition and Feldspar Mineralogy." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4346.
Full textAbstract:
The Dinner Creek Tuff erupted during a period of rhyolitic volcanism coeval to the flood volcanism associated with the Columbia River Basalt Group. The High Rock Caldera Complex, Lake Owyhee and McDermitt volcanic fields account for ~90% of the rhyolites erupted between 16.7-15.0 Ma. Situated at the northern end of the Lake Owyhee volcanic field, the Dinner Creek Tuff was originally mapped as a ~2,000 km2 single ignimbrite confined to the Malheur Gorge. Streck et al. (2015) correlated tuff outcrops previously mapped as generic Miocene welded tuff as well as local units such as the "Mascall" or "Pleasant Valley" tuff of eastern Oregon to individual cooling units that comprise the newly redefined Dinner Creek Tuff, enclosing an area of ~25,000 km2. Areal extents defined in this study show that all outcrops now determined to be Dinner Creek Tuff enclose an area of ~31,800 km2 not including any fallout deposits that likely extended beyond the defined area.
Although Dinner Creek Tuff rhyolites have nearly identical compositions, different ages and subtle geochemical and mineralogical differences exist and were used to divide the Dinner Creek Tuff into four discrete cooling units. Except for unit 4, the units are lithologically very similar. Unit 1 is the Dinner Creek Tuff unit associated with the Malheur Gorge type section. The four cooling units have ages of 16.15-16 Ma (unit 1), 15.6-15.5 Ma (unit 2), 15.46 Ma (unit 3) and 15.0 Ma (unit 4).
Areal extents were established for all four cooling units based on feldspar compositions along with lithological and bulk rock geochemical data. Minimal extents of individual units are as follows: ~22,590 km2 (unit 1), ~17,920 km2 (unit 2), ~14,170 km2 (unit 3) and ~8,370 km2 (unit 4). Using conservative thicknesses, determined erupted tuff volumes are ~170 km3 (unit 1), ~125 km3 (unit 2), ~99 km3 (unit 3) and ~46 km3 (unit 4), totaling ~440 km3 and dense rock equivalents are ~152 km3 (unit 1), ~96 km3 (unit 2), ~76 km3 (unit 3) and ~31 km3 (unit 4), totaling ~356 km3.
These extents and volumes are the absolute minimum based solely on the locations of exposed tuff sections and the inclusion of the source. Centering eruptive units on source areas where they are known, expands the tuff extents into a more radial pattern as would be expected for low-aspect ratio, high energy ash-flow tuff eruptions. These probable extents increase the areal extents of the individual units to: ~36,900 km2 (unit 1), ~31,660 km2 (unit 2), ~17,290 km2 (unit 3) and ~10,150 km2 (unit 4) distributed over a ~43,490 km2 area. Likewise, erupted tuff volume and dense rock equivalents also increase: volume-- ~277 km3 (unit 1), ~222 km3 (unit 2), ~121 km3 (unit 3) and ~56 km3 (unit 4); DRE-- ~248 km3 (unit 1), ~170 km3 (unit 2), ~93 km3 (unit 3) and ~38 km3 (unit 4).
New mapping confirms previous hypotheses that the Castle Rock caldera erupted unit 1 and identified the new Ironside Mountain caldera as the source for unit 2 while precise source areas for unit 3 and 4 are not yet known but are thought to lie within the Dinner Creek Eruptive Center. Minimal calculated caldera volumes for units 1 and 2 are ~98.5 km3 (unit 1) and ~31.1 km3 (unit 2). Adding the thick ponded intra caldera tuff volume to the determined and probable erupted tuff volumes determined in this study, increases the erupted volumes to ~268 km3 (determined) and ~375 km3 (probable) for unit 1 along with ~157 km3 (determined) and ~253 km3 (probable) for unit 2. DREs increase to ~251 km3 (determined) and ~347 km3 (probable) for unit 1 along with ~128 km3 (determined) and ~202 km3 (probable) for unit 2.
10
Heim, Matthew D. "Reflections." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337007594.
Full text
11
Cottin, Maxime. "Le maximalisme dans la Popular Music : L'exemple de King Crimson et du rock progressif." Thesis, Nice, 2014. http://www.theses.fr/2014NICE2045/document.
Full textAbstract:
L'objectif de la thèse est d'établir une physionomie du maximalisme musical présent dans le répertoire de la popular music, plus précisément celui du Rock Progressif au travers l'exemple de King Crimson. Je me suis appliqué, pour ce faire, à identifier quels sont les éléments de l'idiome rock soumis au processus de maximalisation, et quels éléments, présents dans le langage du Rock Progressif, sont empruntés à des genres musicaux extérieurs à la popular music.La thèse comporte deux grands chapitres. Le premier explore les techniques d’écriture et l’esthétique de la popular music, en s’intéressant de près aux questions du langage musical, de l’improvisation et du sens, dans un corpus allant du blues à la pop music. La seconde partie détaille la manière dont se manifeste le processus de maximalisation des structures musicales (harmonie, rythme, forme) dans le répertoire du Rock Progressif anglais. L’exemple de King Crimson est de ce fait particulièrement remarquable dans la mesure où la démarche des musiciens était de combiner l’énergie du rock afro-américain à un vocabulaire musical issu de la musique savante occidentale du début du XXe siècle. Ainsi sont utilisées des structures de hauteurs faisant intervenir une division de l’octave par l’intervalle de triton, qui engendre, entre autres, l’échelle octotonique. L’analyse de la composition « Larks’ Tongues in Aspic » montre comment se combinent des structures de natures différentes, telles que des cycles d’intervalles, des tétracordes, l’échelle octotonique et l’échelle diatonique<br>He goal of the thesis is to establish a physiognomy of musical maximalism in popular music’s repertoire, specifically that of the Progressive Rock through the example of King Crimson. I applied, for that purpose, to identify what were the elements of the rock idiom subjected to the process of maximalization, and what features of the Progressive Rock’s language were borrowed from outside musical genres.The thesis comprises two major chapters. The first explores the writing techniques and the aesthetics of popular music, as interested in issues of musical language, improvisation and meaning, in a corpus ranging from blues to pop music. The second part details the way in which occurs the process of maximalization of musical structures (harmony, rhythm, form) in the English Progressive Rock’s repertoire. The example of King Crimson is noteworthy insofar as the approach of musicians was to combine the energy of African-American rock to a musical vocabulary derived from early 20th century Western art music. So are used pitch structures involving a division of the octave at the interval-class 6, which produces, among other things, the octatonic scale. The analysis of “Larks' Tongues in Aspic” shows how are combined different pitch structures, such as interval cycles, tetrachords, the octatonic scale and the diatonic scale
12
Mueller, Eric. "Temporal and spatial source rock variations and the consequence on crude oil composition in the Tertiary petroleum system of the Uinta Basin, Utah, U.S.A. /." Full-text version available from OU Domain via ProQuest Digital Dissertations, 1998.
Find full text
13
Guzman, Borrero Jose E. "Isochronal: A Suite for Jazz Orchestra." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/1908.
Full textAbstract:
AN ABSTRACT OF THE THESIS OF José E. Guzmán Borrero, for the Master of Music degree in Music Theory and Composition, presented on April 8, 2016, at Southern Illinois University Carbondale. TITLE: ISOCHRONAL: A SUITE FOR JAZZ ORCHESTRA MAJOR PROFESSOR: Dr. Christopher Walczak The suite is a three movement composition for jazz orchestra in which I integrate contemporary compositional methods with the harmonic idioms of the jazz genre. The first movement, “Flight,” takes a minimalist (ca. 1970-1990) approach through the beginning of the piece, then incorporates a development section reminiscent of music from the Classical period with the use of two and three voice counterpoint. Followed by a traditional jazz solo section. The second movement, “'Round Ten” is a ballad featuring the post-tonal compositional method of dodecaphony (ca. 1925-1950) in tandem with melodic and harmonic jazz expressions reminiscent of Thelonious Monk. My compositional use of tone rows is similar to the methods of Benjamin Britten and Alban Berg, who used the row as a compositional guideline or tool. This is unlike the initial use of the row by its founder, Arnold Schoenberg, which restricted the composer by the necessity of using all twelve pitches (with no emphasis on a tonal center) and using it in a predetermined order. The ballad section of the second movement is similar to Thelonious Monk's music in its use of non-harmonic tones and sharp dissonances mixed with a repetitive melodic contour. The third and final movement, “Lights Out!” is an up-tempo piece that uses the dense harmonies reminiscent of Don Menza and Thad Jones’ arrangements. The harmonic structure of the piece is from the modal jazz period of the 1960s in which composers pushed the boundaries of the typical 32-bar song format. The melodic material in this movement includes material from the two previous movements.
14
Escalante, Aramburu Abraham David. "Patterns of distal alteration zonation around Antamina Cu-Zn skarn and Uchucchacua Ag-base metal vein deposits, Peru : mineralogical, chemical and isotopic evidence for fluid composition, and infiltration, and implications for mineral exploration." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/1548.
Full textAbstract:
Intrusion-related, carbonate rock–hosted replacement deposits are an important source of global base metal production that includes: Cu-Zn skarn, Zn-Pb-Ag carbonate replacement and Ag-base metal deposits. These deposits are located in multiple geological settings and are commonly associated with low-grade Cu-Mo calc-alkaline porphyry districts. Visible alteration halos to these deposits range from ten to hundreds of metres around high temperature skarn deposits, being small to imperceptible around the distal relatively low temperature members of this clan. Patterns of visible and cryptic alteration are described and constrained in this study particularly around paleo-fluid flow zones at different distances and elevations from the ore centre. This was done in order to identify the large-scale zonation, mechanisms, and effects of fluid infiltration especially into the distal portions of these deposits. The main alteration tracers employed included mineralogy, major and trace element geochemistry, oxygen and carbon isotopes, and the fluorescent signature of calcite veins associated with the fluids conduits. Two areas were selected for this study: the large Cu-Zn Antamina skarn and the Ag-base metal Uchucchacua vein deposits in the Peruvian Central Andes as these deposits represent the end-members of the polymetallic carbonate rock-hosted deposits and hence, provide an excellent opportunity to examine the margins and upper sections of these hydrothermal systems.
Geochronological analyses of intrusive dikes were used to establish the magmatic and hydrothermal evolution associated with mineralization, as well as the genetic linkage between proximal and distal portions of the mineralizing system at Antamina. Oxygen, carbon and strontium isotope data of vein minerals is also used to constrain the temperature of the fluids proximal and distal to the magmatic centre. Chemical data of fluorescent and non-fluorescent veins were used to determine the main activators of fluorescence and to constrain its relationship with mineralizing fluids.
In summary, results of this research identify a large-scale zonation of visible and cryptic alteration around paleo-fluid flow zones demonstrating the linkage between Ag-base metal veins, replacement and skarn deposits. Anomalous halos determined throughout Antamina and Uchucchacua deposits may contribute to the development of a more systematic exploration methodology for these types of deposits.
15
Enge, Ida Baltzersen. "The Effect of Brine Composition and Rock Type on Oil Recovery by the Use of Combined Low-Salinity Waterflooding and Surfactant Flooding : A Literature Review and Experimental Study." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25843.
Full textAbstract:
The possibility of achieving incremental oil recovery by the use of low salinity injection water has been demonstrated by numerous laboratory experiments and an increasing amount of field trials. The underlying mechanisms behind this phenomenon are not well understood, but many researchers have suggested that it is related to complex crude oil/brine/rock interactions. In recent years, positive results have been presented regarding the combination of low salinity water and surfactant injection. This Thesis aims to investigate the effect of brine composition and rock type on low salinity surfactant injection.A series of coreflooding experiments were conducted on two different types of outcrop Berea sandstone cores, with different mineral composition, aged with different compositions of brine containing varying concentrations of NaCl, CaCl2 and MgCl2 and one crude oil. The cores were flooded with low salinity brine in secondary mode, and a low salinity surfactant solution, using the anionic surfactant Sodium Dodecylbenzene Sulfonate, in tertiary mode, both performed at 60°C. Oil recovery and the shape of production curves were analyzed and compared. The results show a clear trend that oil recovery is highest when the contrast between in-situ- and flooding divalent cation content is highest. Cores saturated with a brine containing 10% divalents, where 9% of this was CaCl2, and flooded with pure NaCl brine, produced the highest amount of oil during low salinity brine injection for both types of Berea cores. The low salinity oil recovery ranged from 42.3 to 57.7% OOIP. Low salinity surfactant injection recovered incremental oil for all the corefloods, varying from 2.1 to 8.5% OOIP. Another observation was that cores aged with brines containing divalent cations appeared to be more oil-wet, and had a larger benefit from the low ionic strength of the injection brine, regardless of the mineral composition of the rock. The shape of the production curve for some of these cores indicated a change in wettability during the low salinity brine injection.There is an increasing interest in designing an injection brine composition with the aim of recovering maximum amount of oil. Optimized composition can also lead to maximum recovery of a chemical flood. This research was carried out having this mindset. It was observed that by changing the chemistry of the injection brine, while everything else was fixed in the COBR system, there was an 11% difference in in oil recovery in low salinity waterflooding and an 18% difference in final oil recovery after tertiary low salinity surfactant flooding. This reinforces the importance of the brine composition on oil recovery, and presents a basis for further research.
16
Tafesse, Solomon. "Physical properties of coarse particles in till coupled to bedrock composition based on new 3D image analysis method." Licentiate thesis, KTH, Land and Water Resources Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11988.
Full textAbstract:
<p>The physical properties of the coarse fraction of the till (0.4 to 20 cm) and the surface boulders have been studied at two different sites in Sweden. The research work included: development of a new image analysis software for 3D size and shape measurements of particles; lithological analysis on multiple size fractions in till and magnetic susceptibility survey on coarse till clasts, surface boulders and local bedrock.</p><p>The new 3D image analysis method provides an enormous amount of size and shape data for each particle in the coarse fraction (2 to 20 cm) in till. The method is suitable for field study, cost effective and the software is executable in Matlab. The field imaging method together with the image analysis software give non subjective results of size and shape of coarse particles and makes it feasible and easy to study representative sample size, which is one tonne for testing clasts of size up to 20 cm.</p><p>The lithological analysis of the multiple size fraction of the till clasts has been investigated on six different size fractions of the till (0.4 to 20 cm); the result of the different samples from the two sites shows that this method can potentially be used as a stratigraphic tool in the areas where there is no unique indicator lithologies.</p><p>The magnetic susceptibility has been made on the surface boulders, the 6-20 cm till fraction and on insitu bedrock outcrops near to the study sites. The method has good potential for determining stratigraphic relationships between different till units as well as for determining the provenance ofcoarse clasts and surface boulders.</p>
17
Nuttall, Keir. "I’m with Muriel: Applying a persona-centred songwriting technique to the creation of a new Australian musical." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/209305/1/Keir_Nuttall_Thesis.pdf.
Full textAbstract:
This Thesis by Creative Works advances a new method of songwriting centred around the concept of persona. Drawing on Csikszentmihalyi’s Systems Model of Creativity and Auslander’s work on persona and popular music performance, the thesis develops a model of songwriting that is then applied in the creation of new music and lyrics for the Australian musical theatre production, Muriel's Wedding the Musical.
18
Lix, Claire. "Present-day fluid-rock interaction in a sedimentary basin : study case of the Granada Basin (Betic Cordillera, Spain)." Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS200.pdf.
Full textAbstract:
Comprendre les circulations des fluides dans les bassins sédimentaires joue un rôle crucial dans les divers domaines des ressources naturelles. Dans cette thèse, une approche géochimique est développée pour caractériser la géochimie des eaux souterraines actuelles et pour étudier les réactions affectant un système sédimentaire, en prenant le bassin de Grenade comme cas d'étude. La composition isotopique de l'hélium des gaz libres et dissous a été étudiée afin de contraindre la structure lithosphérique de la région. La composition isotopique de He montre une composante radiogénique dominante avec une contribution mantellique atteignant 1 %. L'évaluation des mécanismes de transport de l'He montre que la croûte est actuellement dissociée du manteau. Nous proposons donc que l’He mantellique observé pourrait résulter d’une contribution fossile du manteau associée à une production crustale à partir de roches riches en Li. Les interactions eau-roche dans les Cordillères Bétiques ont été étudiées en caractérisant les systèmes géothermaux de faible et moyenne enthalpie. Cette étude montre une relation étroite entre la température et la pCO2 dans le réservoir et met en évidence le rôle des tampons minéraux du remplissage sédimentaire et du socle sur la réactivité du CO2. L’étude plus approfondie de la réactivité dans le bassin de Grenade permet de mieux comprendre les écoulements à l’échelle de l’ensemble du bassin. L'évolution de la saturation des eaux vis-à-vis des carbonates, des alumino-silicates et des sulfates permet d'évaluer les chemins possibles d’écoulement dans le bassin et d'appréhender un modèle conceptuel de transport réactif<br>Understanding fluid circulations in sedimentary basins plays a critical role in the diverse fields of energy and natural resources. In this thesis, a geochemical approach is developed to characterize the present-day groundwater geochemistry and to investigate the reactions affecting a sedimentary system, taking the Granada Basin as a regional study case. Helium isotopic composition of bubbling and dissolved gases has been investigated to set constrains on the lithospheric structure of the area. We found that the He isotopic composition has a dominant radiogenic component with a mantle-derived He contribution reaching mainly 1 %. The evaluation of helium transport mechanisms shows that the crustal system is currently dissociated from the mantle system. We therefore propose that the observed mantle-derived He could result from fossil mantle contribution associated to crustal production from Li-rich rocks. Water-rock interactions in the Central Betic Cordillera have been investigated by characterizing the low- to medium-enthalpy thermal systems. This study, combining geothermometrical methods, shows a strong relationship between the temperature and the pCO2 in the reservoir and highlights the role of the potential mineral buffers of both the sedimentary infilling and the basement on the reactivity of CO2. Further investigations on the reactivity within the Granada Basin allow us to give insights on the groundwater flows at the scale of the whole basin. The evolution of the groundwater saturation with respect to carbonates, alumino-silicates, and sulfates allows to assess the possible flow paths in the basin and to apprehend a conceptual reactive transport model
19
Mayfield, Stephen. "Assessment of predation by the West Coast rock lobster (Jasus lalandii) : relationships among growth rate, diet and benthic community composition, with implications for the survival of juvenile abalone (Haliotis midae)." Doctoral thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/9603.
Full textAbstract:
Bibliography: leaves 195-213.<br>This thesis focused on two aspects of predation by the West Coast rock lobster (Jasus lalandii). These were (1) the problem of slow growth currently observed in adult male rock lobsters and the putative link between growth rate and food availability, and (2) the influence of rock-lobster predation on the benthos, but more specifically on sea urchins and juvenile abalone.
20
Thorpe, Vicki. "We made this song : the group song writing processes of three adolescent rock bands : a thesis submitted to the New Zealand School of Music in fulfilment of the requirements for the degree of Master of Music in History and Literature of Music /." ResearhArchive@Victoria e-Thesis, 2007. http://hdl.handle.net/10063/272.
Full text
21
Pflumio, Catherine. "Histoire volcanique et hydrothermale du massif de salahi : implications sur l'origine et l'evolution de l'ophiolite de semail (oman)." Paris, ENMP, 1988. http://www.theses.fr/1988ENMP0112.
Full textAbstract:
L'etude petrographique et geochimique de l'ophiolite de semail (massif salahi, oman) qui represente le plus vaste affleurement de lithosphere oceanique fossile permet de distinguer 3 phases de volcanisme, presentant des rapports ta/th anormaux qui sont interpretes comme les temoins d'une anomalie mantellaire regionale. Un modele d'evolution en contexte oceanique franc est propose. L'etude des differents episodes de circulation hydrothermale est egalement abordee
22
Marot, Marianne. "Zones de subduction horizontale versus normale : une comparaison basée sur la tomographie sismique en 3-D et de la modélisation pétrologique de la lithosphère continentale du Chili Central et d’Ouest de l’Argentine (29°S-35°S)." Thesis, Nice, 2013. http://www.theses.fr/2013NICE4046/document.
Full textAbstract:
Sous le Chili central et l’ouest de l'Argentine (29°-35°S), la plaque océanique Nazca, en subduction sous la plaque continentale Amérique du Sud, change radicalement de géométrie : inclinée à 30°, puis horizontale, engendrée par la subduction de la chaine de volcans de Juan Fernandez. Le but de mon étude est d'évaluer, la variation de nature et de propriétés physiques de la lithosphère chevauchante entre ces deux régions afin de mieux comprendre (1) sa structure profonde et (2) les liens entre les déformations observées en surface et en profondeur. Pour répondre à cette thématique, j’utilise une approche originale couplant la sismologie, la thermométrie, et la pétrologie. Je montre ainsi des images 3-D de tomographie sismique les plus complètes de cette région par rapport aux études précédentes, qui intègrent (1) de nombreuses données sismiques provenant de plusieurs catalogues, (2) un réseau de stations sismiques plus dense permettant de mieux imager la zone de subduction. J’apporte la preuve que la plaque en subduction se déshydrate dans deux régions distinctes : (1) le coin mantellique, et (2) le long de la ride subduite avant que celle-ci ne replonge plus profondément dans le manteau. La croûte continentale au-dessus du flat slab possède des propriétés sismiques très hétérogènes en relation avec des structures de déformation profondes et des domaines géologiques spécifiques. La croûte chevauchante d’avant-arc, au-dessus du flat slab, est décrite par des propriétés sismiques inhabituelles, liées à la géométrie particulière du slab en profondeur, et/ou liées aux effets du séisme de 1997 de Punitaqui (Mw 7.1). Mes résultats, confirmant les études antérieures, montrent que : - le bloc Cuyania situé plus à l’est, dans la zone d’arrière-arc est plus mafique et contient une croûte inférieure éclogitisée ; quant à, la croûte continentale inférieure sous l’arc Andin, est épaisse et non-éclogitisée, décrivant surement le bloc felsique de Chilenia<br>Beneath central Chile and western Argentina, the oceanic Nazca slab drastically changes geometry from horizontal to dipping at an angle of 30°, and correlates with the subduction of the Juan Fernandez seamount ridge. The aim of our study is to assess, using a thermo-petrological-seismological approach, the differences of the overriding lithosphere between these two regions, in order to better understand the deep structure of the continental lithosphere above the flat slab, and the links between the deformations at the surface and at depth. We show the most complete regional 3-D seismic tomography images of this region, whereby, in comparison to previous studies, we use (1) a much larger seismic dataset compiled from several short-term seismic catalogs, (2) a much denser seismic station network which enables us to resolve better the subduction zone. We show significant seismic differences between the flat and normal subduction zones. As expected, the flat slab region is impacted by colder temperatures, and therefore by faster seismic velocities and more intense seismic activity, compared to the normal slab region. We show evidence that the flat slab dehydrates within the mantle wedge, but also along the subducting ridge prior to re-subducting. The forearc crust above the flat slab is described by unusual seismic properties, correlated to the slab geometry at depth, and/or, to the aftershock effects of the 1997 Mw 7.1 Punitaqui earthquake which occurred two years before the recording of our events. The continental crust above the flat slab has very heterogeneous seismic properties which correlate with important deformation structures and geological terranes at the surface. We confirm previous studies that have shown that the thick lower crust of the present day Andean arc is non-eclogitized and maybe representing the felsic Chilenia terrane, whereas to the east, the Cuyania terrane in the backarc is more mafic and contains an eclogitized lower crust
23
Poblete-Grant, Patricia Victoria. "Impact of poultry manure application, alone or combined with phosphate rock on biogeochemical cycling of C and P in grassland soils." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS294.
Full textAbstract:
Les fertilisants phosphatés sont issus de sources de phosphate minéral (RP) non renouvelables. Dans le futur, il a été mis en évidence une raréfaction de ces sources due à de forts besoins d’augmentation des rendements visant à l’alimentation de la population mondiale grandissante. Des alternatives avec l’utilisation de sources de phosphore (P) inorganique sont encouragées pour promouvoir la durabilité des systèmes agricoles. Cette thèse a été réalisée afin d’estimer l’impact de l’application de fumier de volaille (PM), seul ou combiné avec du PM, sur la qualité du sol, la séquestration du carbone (C), la disponibilité du P et la production de ray-grass. Des échantillonnages sur quatre fermes amendées sur le long terme avec du PM composté ont été effectués et une expérience en laboratoire à l’aide de marquage au 13C utilisant du compost de PM, du RP et une combinaison des deux (PMRP) sur la croissance de ray-grass sur deux types de sol a été réalisée. Ce travail de recherche a montré que les applications sur le long terme de composts de PM au champ augmentent significativement la teneur en C organique du sol. En favorisant les particules de grandes tailles via des applications de PM, on augmente la teneur en C organique du sol et le P disponible. Par ailleurs, l’expérience de laboratoire permet de montrer que la combinaison de PM et de RP a un effet positif sur la disponibilité du P dans les deux types de sol, alors que concernant les paramètres liés aux plantes, les effets synergétiques et antagonistes étaient, eux, dépendants du type de sol. Cette étude indique clairement que le compost de PM et sa combinaison avec le RP appliqué dans deux types de sols augmente la teneur en C organique du sol ainsi que le C organique labile. D’avantage d’expérimentations de terrain sont nécessaires pour rendre compte de manière réaliste et efficace de l’effet du PM seul et combiné avec des RP pour déterminer à long terme la stabilisation du C et la disponibilité du P, incluant les paramètres de productivité et de qualité des cultures<br>Phosphate fertilizers are manufactured from the non-renewable phosphate rock (RP) sources. In the future, it has been prospected a scarcity of this sources due to its high demand to enhance crops yields for feeding the growing world population. Alternatives in the use of inorganic phosphorus (P) sources are encouraged to promote the sustainability in agricultural systems. This thesis project was performed to assess the impact of poultry manure (PM) application, alone or combined with RP, on soil quality, carbon (C) sequestration, P availability and ryegrass production. We sampled four different farms amended with long-term PM compost and, also, we performed a 13C labelled laboratory experiment using PM compost, RP, and their combination (PMRP) on ryegrass plants grown on two soil types. Our research showed that soils receiving long-term PM compost increased significantly SOC content. Promoting larger particle size by PM led to an increase on SOC and available P. On the other hand, from the laboratory experiment we reported that the combined use of PM and RP, showed a positive effect for soil available P in both soils, while for plant parameters, synergistic and antagonistic effects were soil type dependent. Our study clearly indicated that both PM compost and its mixture with RP applied in two different soil types increased total SOC and labile organic C. Moreover, the greatest contribution to stored SOC were observed as PM compost-derived C. Further field experiments are needed to account realistic and effective effect of PM alone and its mixture with RP to assess long-term soil C stabilization and P availability, including plant productive and quality parameters
24
Dissler, Eric. "Evolution geodynamique cadomienne du nord-cotentin (massif armoricain)." Caen, 1987. http://www.theses.fr/1987CAEN2048.
Full textAbstract:
La structuration actuelle des terrains brioveriens resulte en grande partie de l'evolution tectono-metamorphique varisque. La chaine cadomienne accuse une vergence nord-ouest. L'identification geochimique des series volcaniques brioveriennes revele une affinite tholeitique generalisee. Une tendance calcoalcaline s'exprime en revanche au sein du batholite de la hague. L'enchainement des premieres etapes de l'evolution geodynamique cadomienne est ainsi etablie, le magmatisme du brioverien inferieur traduisant le fonctionnement d'un dispositif arcs insulaires-bassins marginaux de type marge ouest du pacifique, installe sur des lambeaux de croute pentevrienne
25
Lyons, Frank. "Commentaries on a portfolio of original compositions." Thesis, University of Ulster, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302238.
Full text
26
Gustafsson, Pär. "Digital compositing i 3D-miljö." Thesis, University of Gävle, Ämnesavdelningen för datavetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-5641.
Full textAbstract:
<p>I dagens visuella effekter är digital compositing en av de viktigaste processerna. Från att uteslutande ha utförts i 2D har digital compositing dock kommit att innebära en alltmer tredimensionell process. Det här arbetet reder ut begreppet 3D-compositing och sammanställer vilka 3D-compositingtekniker som är vanligt förekommande. Ett urval av dessa tekniker tillämpas sedan i en egen effektsekvens. Slutsatsen blir att det är kombinationen av 3D-funkionalitet och 2D-compositing i samma program som är styrkan med digital compositing i 3D-miljö.</p>
27
Benard, Charlène. "Le « metal à chanteuse », un genre musical ? Une enquête sur la construction médiaculturelle d’un genre musical par le gender. Le cas du metal symphonique en France." Electronic Thesis or Diss., Paris 3, 2023. https://bsnum.sorbonne-nouvelle.fr/files/original/1338/6773/These_en_cours_de_traitement.pdf.
Full textAbstract:
Le metal symphonique est un sous-genre de musique metal qui a la particularité de compter une majorité de groupes où le chant est tenu par une femme : 80% en moyenne, se présentant à la fois comme une spécificité dans une culture musicale majoritairement masculine, autant qu’une régularité dans les musiques populaires où la proportion de chanteuses parmi les musiciennes en représente la grande majorité. Cette thèse a donc pour objectif de mesurer le rôle des femmes d’une part et de vocaliste d’autre part dans la définition d’un genre musical, au prisme d’une approche culturelle des musiques metal d’une part, et de leur situation en France d’autre part, des débuts du metal symphonique en 1996 à nos jours. Musique la plus détestée des Français, le metal compte essentiellement sur ses propres réseaux pour se développer : la presse spécialisée et la scène locale live. L’une et l’autre sont analysées dans cette thèse, entre discours promotionnels et évaluatifs de la presse sur les disques et production de concerts sur le sol français, de l’accueil des groupes étrangers à l’autoproduction locale. Ce travail tend ainsi à mesurer non seulement le rôle des chanteuses en tant qu’interprètes et créatrices de musique mais également leur implication dans l’activité d’une scène souvent présentée comme masculine, où leur place centrale mais négociée suggère d’en nuancer la domination. Complétée d’une enquête par questionnaire et entretiens, cette thèse discute enfin la notion de « goût féminin » et de « féminisation » d’un genre et d’une scène dans une approche compréhensive<br>Symphonic metal is a subgenre of metal music, which has the particularity of presenting a majority groups lead by female singers (80% on average). This feature is common to both this predominantly male culture, and to popular music more broadly, as the great majority of female musicians tend to be singers. This dissertation aims to measure the role played by women and by singers in the shaping of a musical genre, through a cultural approach of metal culture and of its situation in France, from the genre’s inception in 1996 to the present day.As the most hated genre of music in France, metal must rely mainly on its own networks in order to subsist and foster in this country: its press and local live scenes. Through the analysis of these two elements, this study considers promotional and evaluative media discourses on metal recordings and the production of concerts in France, from foreign bands touring around the country to the grassroots production of local events. Its aim is to consider not only the role female singers play as performers and creators, but also their involvement in the life of a scene often considered as masculine: their position, both central and negotiated, tends to limit the situation of domination. Through a complementary, comprehensive approach based on a questionnaire and interviews, this thesis also discusses the notions of “feminine taste” and of the “feminization” of a genre and a scene
28
Kirste, Dirk Marten. "Compositional variation in formation fluids and their relation to fluid flow and water-rock interaction in Devonian to Lower Cretaceous sedimentary rocks of southern Alberta." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq64868.pdf.
Full text
29
Wang, Haiyang. "Devolatilization During the Formation of Rocky Planets: Bulk Elemental Composition." Phd thesis, Canberra, ACT : The Australian National University, 2018. http://hdl.handle.net/1885/153341.
Full textAbstract:
As the solar nebula condensed, evaporated and fractionated to
form the nascent Earth, the bulk elemental composition of the
Earth was established. To first order, the Earth is a
devolatilized sample of the solar nebula. Similarly, rocky
exoplanets are also likely devolatilized samples of the stellar
nebulae out of which they and their host stars formed. If this
assumption holds, we can estimate the chemical composition of
rocky exoplanets by applying a devolatilization algorithm based
on the elemental abundances of their host stars. This thesis is
an investigation of this potentially universal devolatilization
pattern, from which exoplanetary chemistry and habitability are
then derived.
To quantify (in broad terms) the chemical relationships
between the Earth, the Sun and other bodies in the Solar System,
the elemental abundances of the bulk Earth are required. The key
to comparing Earth’s composition with those of other objects is
to have a determination of the bulk composition with an
appropriate estimate of un- certainties. We present concordance
estimates (with uncertainties) of the elemental abundances of the
bulk Earth, by compiling, combining, and renormalizing a large
set of heterogeneous literature values of the primitive mantle
and of the core. The weighting factor for the concordance
estimates comes from our new estimate of the core mass fraction
of the Earth: 32.5±0.3 wt% (weight percent). The uncertainties
on our elemental abundances usefully calibrate the unresolved
discrepancies between standard Earth models made under various
geochemical and geophysical assump- tions.
We then extend our assessment of terrestrial abundances to
the modeling of pro- tosolar abundances based on the latest
estimates of solar photospheric abundances and primitive
meteoritic abundances. We compare our new protosolar abundances
with our estimates of bulk Earth composition, thereby quantifying
the devolatiliza- tion of the solar nebula that led to the
formation of the Earth. As a function of elemental 50%
condensation temperatures (TC), we fit the Earth-to-Sun abundance
ratios f to the linear trend log( f ) = a log(TC ) + b. The best
fit coefficients are: a = 3.676 ± 0.142 and b = 11.556 ±
0.436. The quantification of the slope a provides an empirical
observation upon which modeling of the devolatilization processes
can be based. These coefficients determine a critical
devolatilization temperature for the Earth TD(E) = 1391 ± 15 K.
The resultant devolatilization pattern allows inferences to be
made concerning the depletions of elements in the early solar
system and is potentially useful for estimating the chemical
composition of rocky exoplanets from their known host stellar
abundances.
We apply the devolatilization pattern to nearby planetary
systems to infer the bulk elemental composition of rocky
exoplanets – particularly those within the cir- cumstellar
habitable zones – from the known host stellar elemental
abundances. The estimated bulk planetary composition (rather than
the host stellar abundances) is then used as a principal
constraint to model the interior composition and structure of
such exoplanets. We apply these constraints to four planet host
stars: Kepler-10, Kepler-20, Kepler-21 and Kepler-100, to model
the interiors including the mantle and core compositions as well
as core mass fraction for potential terrestrial exoplanets
orbiting these host stars. With respect to the estimates of the
interiors, we conclude that a potential terrestrial exoplanet
orbiting Kepler-21 would be the most Earth-like while one
orbiting Kepler-10 would be the least.
30
Bramwell, M. G. "Crystal growth in some metamorphic rocks from the Lukmanier region, Switzerland." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372952.
Full text
31
Pett, Teresa K. "Garnetites of the Cardigan Pluton - Evidence for Restite and Implications for Source Rock Compositions." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1099.
Full textAbstract:
The Cardigan pluton, located in the southern half of New Hampshire, is a strongly peraluminous, S-type granite which is granodioritic in composition. It is inferred to have been emplaced rapidly, thrust up along west-verging nappes during the Acadian orogeny. Distinctive pods, consisting of 50 to 70 percent modal garnet, are found throughout the pluton in assemblages of garnet + sillimanite + biotite + plagioclase + quartz. These garnetite rocks present an intriguing case for restite. Textural features of the garnetite rocks, such as fibrolitic sillimanite mats and flat, unzoned major and trace-element garnet grain profiles, provide evidence for biotite dehydration melting with single-stage garnet growth from the reaction: bio + plag + qtz + kspar = gar + sill + liq. Temperatures calculated using garnet-biotite (GB) thermometry and garnet-aluminum silicate-quartz-plagioclase (GASP) barometry yield estimates between 662-714ºC and 3.8 kbars. These low calculated temperatures are most likely the result of biotite compositions which have been altered by retrograde exchange reactions. The dominant source rock for the Cardigan magmas was likely calc-pelitic to greywacke in composition. Major element modeling suggests that ~70% melting of a calc-pelitic metasediment from the Central Maine trough could have generated a granodioritic melt similar to the average granodiorite of the Cardigan pluton. However, most of the Cardigan garnetite rocks appear to have been derived from pelites, as they are too poor in CaO and Na2O. Hence, though the majority of garnetite rocks cannot represent the dominant restite of the source rocks that produced the Cardigan pluton, they do appear to be the melt-depleted residue of an unidentified pelitic source. Comparison of Nd and Sr isotopic data from garnetite and Central Maine trough metasediments permit an interpretation that the Lower Rangeley Formation, from the Central Maine trough, could be the source rock of the Cardigan magmas. However, one feldspar Pb isotopic analysis in the literature (Moench and Allienikoff, 2002) and rare monazite chemical ages near 600 Ma suggest that the Cardigan pluton does not have a Laurentian source (i.e. Lower Rangeley Formation or other Central Maine trough metasediments), whereas an inferred peri-Gondwanan basement source is permissible.
32
Costarella, René. "Le complexe annulaire alcalin de Combeynot ( Massifs cristallins externes, Alpes françaises), témoin d'un magmatisme en régime distensif. Pétrogéochimie et signification géodynamique." Phd thesis, Grenoble 1, 1987. http://tel.archives-ouvertes.fr/tel-00539879.
Full textAbstract:
Le massif de Combeynot, sur la bordure nord-orientale du massif du Haut-Dauphiné (massifs cristallins externes, Alpes Françaises) est constitué de deux unités fondamentales (1) un socle, déformé et métamorphisé, représenté par un ensemble migmatitique et un orthogneiss oeillé ; ce socle se rattache aux formations du noyau du massif du Haut-Dauphiné, (2) un complexe annulaire subvolcanique, intrusif dans le socle, composé de formations volcaniques et volcano-détritiques, d'un réseau filonien microgranitique et rhyolitique très dense, de deux unités granitiques disposées de manière concentrique et de filons doléritiques tardifs terminant l'épisode magmatique. Une étude comparative sur la pétrographie, la structure, la typologie des zircons et la géochimie des éléments majeurs, en traces (Y, Nb, Zr, Rb, Sr, U, Th, Hf, Sc, Cs et Ta) et Terres Rares du complexe de Combeynot ont permis de retracer l'histoire magmatique de la série et de tester sa signification géodynamique. Le magmatisme de Combeynot est de nature alcaline intraplaque et traduit un environnement géotectonique de distension. Il trouve son origine dans le manteau à partir duquel plusieurs magmas subcontemporains s'individualisent par des taux de fusion partielle différents et conduisent aux unités acides par cristallisation fractionnée. Leur mise en place superficielle dans une zone orogénique encore non consolidée, riche en fluides et la participation des phases fluides juvéniles et/ou des eaux météoriques conditionnent la nature pétrographique acide, sursaturée et subsolvus des unités granitiques du complexe ainsi que les processus d'altération hydrothermale post- et tardi- magmatiques.
33
Benzakour, Abderrahim. "Le volcanisme permien des Vosges du Nord : un témoin d'une évolution dans le cycle orogénique varisque de l'Europe occidentale." Nancy 1, 1988. http://www.theses.fr/1988NAN10252.
Full textAbstract:
Cette thèse présente une étude pétrographique et géochimique des roches volcaniques (diabases, trachy-andésites, rhyodacites, rhyolites, ignimbrites) permienne des Vosges du Nord en vue de connaître les relations pétrogénétiques entre les différents faciès et le cadre géodynamique de leur mise en place. Deux séries calcoalcalines sont distinguées et l'enrichissement en K::(2)O qui représente un caractère généralisé de ces roches est discuté
34
Dabbs, Jennifer Marie, and Jennifer Marie Dabbs. "Trace Element Composition of Apatite from Intrusive Rocks in Northeastern Nevada, USA." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/620842.
Full textAbstract:
The apatite crystal structure-A5(TO4)3X-allows for complex substitutions of various minor and trace elements including volatile constituents, rare earth elements, and redox sensitive elements (e.g., As, Mn, Fe, S) (Piccoli and Candela, 1994; Piccoli and Candela, 2002; Pan and Fleet, 2002; Teiber et al., 2015; Harlov, 2015). In this study, apatite grains from 19 intrusions across northeastern Nevada with varied petrogenetic and metallogenic properties were analyzed by electron probe microanalysis (EPMA) to obtain major and trace element abundances. Systematic variations in Sr and REE concentrations in apatite grains from granitic host rocks are the result of competition with pre-existing and coexisting minerals in silicate melts. The presence of zoning in cathodoluminescence colors combined with high Sr concentrations in apatite from many of the Eocene granodiorite rocks suggest magma mixing affected the geochemical evolution in many of the Eocene igneous systems. In addition, high Sr concentrations in apatite grains from Late Cretaceous two-mica granites may reflect significant magmatic input from lower crustal and/or mantle sources despite the felsic nature of these intrusive rocks.A new EPMA analytical routine to measure arsenic down to detection limits of approximately 20 ppm allowed a more extensive characterization of As concentration in igneous apatite than has previously been published. Still, correlations between As and other trace-element concentrations are not evident, which may reflect the simple substitution of As5+ for P5+ in the apatite structure. Petrologic controls on As content include redox state, indicated by the high Asapat/Asbulk-rock in relatively oxidized intrusive rocks. An additional control is competition among other magmatic phases, exsolving aqueous fluids, or sulfide melts, indicated by enrichment of As in apatite cores relative to apatite rims. Past studies on redox-sensitive elements in igneous apatite have focused on Mn and S, but with further investigation, As may also prove to be a key redox-sensitive trace element in apatite for interpreting igneous and hydrothermal processes.
35
Cunha, André Araújo Lima da. "Rogério Duprat, o quarto Mutante: a trajetória do compositor vanguardista junto ao grupo de rock brasileiro." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/27/27158/tde-07032014-152528/.
Full textAbstract:
Este trabalho apresenta de maneira analítica, um panorama sobre a atuação do compositor e arranjador Rogério Duprat junto ao grupo Os Mutantes. Sobretudo, imprimindo uma visão prática sobre as atividades do compositor vanguardista através do grupo de rock brasileiro, enquanto possível desdobramento e continuação das proposições estéticas vanguardistas manifestas pelo próprio compositor, desde seu envolvimento com o Movimento de Música Nova do início da década de 1960, transcendendo sua participação no chamado Movimento Tropicalista e o cenário musical brasileiro de fins da mesma década. As observações feitas neste trabalho evidenciam as posições do compositor, pelo abandono das dicotomias erudito x popular, na integração de elementos musicais inusitados na obra do conjunto, diante de seu desejo de diálogo com os valores contraculturais que se apresentaram na época, através da guitarra elétrica e o rock<br>This study presents an analytical overview of the role of composer and arranger Rogério Duprat with the band Os Mutantes. Above all, it prints a practical insight into the activities of the vanguardist composer through the Brazilian rock group, and enables an unfolding and possible continuation of the avant-garde aesthetic propositions expressed by the composer himself, from his involvement with the Música Nova Movement in the early 1960\'s, transcending his participation in the Tropicália Movement and the Brazilian music scene at the end of the same decade. The notes made in this study show the composer\'s position by the abandonment of the classical vs. popular dichotomy in the integration of unusual musical elements in the work assembly before his longing to dialogue with countercultural values that were present at the time, through electric guitar and rock.
36
Saenger, Anaïs. "Caractérisation et stabilité de la matière organique du sol en contexte montagnard calcaire : proposition d'indicateurs pour le suivi de la qualité des sols à l'échelle du paysage." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENS010/document.
Full textAbstract:
Les sols de montagne représentent d'importants réservoirs de carbone (C) potentiellement vulnérables aux changements climatiques et changements d'usage qui les affectent de manière amplifiée. Or la grande variabilité de ces milieux, leur faible accessibilité ainsi que le manque d'outils de mesure appropriés limitent nos connaissances qui restent aujourd'hui très fragmentaires en ce qui concerne les stocks, la chimie et la réactivité du carbone organique des sols (COS). Ces informations sont pourtant nécessaires pour appréhender l'évolution de ces sols et de leur C dans ce contexte de changements globaux. Les objectifs de ce travail de thèse étaient (i) d'accéder à une meilleure compréhension de la nature, de la stabilité et de la vulnérabilité du COS dans une mosaïque d'écosystèmes des Préalpes calcaires (massif du Vercors), (ii) de rechercher des outils de caractérisation rapides et fiables adaptés à l'étude et au suivi du COS à l'échelle du paysage, et enfin (iii) de proposer des indices pour l'évaluation et le suivi de la qualité des sols en milieu de montagne. Dans un premier temps, nous avons testé l'application de la pyrolyse Rock-Eval pour l'étude du COS à grande échelle sur un ensemble d'unités écosystémiques. Nous avons ensuite comparé la pyrolyse Rock-Eval à deux techniques classiques d'étude de la matière organique du sol (MOS) : le fractionnement granulodensimétrique de la MOS et la spectroscopie moyen infrarouge. Ces approches analytiques couplées nous ont permis de quantifier les stocks de C à l'échelle de la zone d'étude et d'expliquer la stabilité et la vulnérabilité du COS sous des angles variés. Les facteurs responsables des patrons observés dans les différentes unités écosystémiques sont discutés. Ce travail a également confirmé la pertinence de l'outil Rock-Eval pour répondre aux objectifs fixés. Parallèlement, des approches biologiques nous ont permis d'évaluer l'importance de la composante microbienne dans ces sols. Enfin, des indices évaluant le statut organique des sols (stockage de COS, fertilité des sols, vulnérabilité du COS) sont proposés pour constituer des outils de gestion et d'aide à la décision<br>Mountain soils are major reservoirs of carbon (C), potentially vulnerable to climate and land use changes that affect them significantly. However, the great variability of these soils, their limited accessibility and the lack of appropriate measurement tools restrict our knowledge. Today, our comprehension of the biogeochemistry of mountain soils remains very incomplete regarding stocks, chemistry and reactivity of soil organic carbon (SOC). Yet this information is necessary to understand the evolution of soil carbon in the current context of global change. The objectives of this work were (i) to gain a better understanding of the nature, stability and vulnerability of SOC in a mosaic of ecosystems in a calcareous massif in the Alps (Vercors massif), (ii) to search for fast and reliable characterization tools, suitable for the study and monitoring of COS at the landscape scale, and (iii) to propose indicators for the assessment and monitoring of soil quality in mountain regions. As a first step, we tested the application of Rock-Eval pyrolysis for the study of COS at large-scale on a set of ecosystem units. Then, we compared the Rock-Eval approach to two conventional techniques for soil organic matter (SOM) study: the particle-size fractionation of SOM, and the mid-infrared spectroscopy. These coupled analytical approaches allowed us to quantify C stocks across the study area, and explain the stability and the vulnerability of COS at various angles. Factors responsible for the patterns observed in the different eco-units are discussed. This work also confirmed the relevance of the Rock-Eval tool to achieve our previous objectives. Biological approaches allowed us to assess the significance of microbial pool in these soils. Finally, indices assessing the status of SOM (SOC storage, soil fertility, vulnerability COS) were proposed and constituted interesting management tools for decision-makers
37
Siegel, Coralie. "Heat-producing element enrichment in granitic rocks, the role of crustal composition and evolution." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/85344/1/Coralie_Siegel_Thesis.pdf.
Full textAbstract:
This study greatly enhanced our knowledge of the potential for geothermal energy development in Queensland as a viable clean energy source in the coming decades. Key outcomes of the project were understanding the first-order controls on the concentration of the heat-producing elements: uranium, thorium and potassium in granitic rocks, and constraining where rocks with the greatest heat-producing potential lie at depth in Queensland. Importantly, new temperature and heat flow maps for southwest Queensland were developed that will greatly assist future exploration efforts.
38
Garratt, Iain Michael Ronald. "The assessment of variable buffer zones to manage rocky ridges in Johannesburg, Gauteng / I.M.R. Garratt." Thesis, North-West University, 2006. http://hdl.handle.net/10394/18.
Full text
39
Wu, Siyu. "Harmonic and Rhythmic Transformation in Ligeti's Harpsichord Compositions: A Comparative Analysis of Continuum, Hungarian Rock and Passacaglia Ungherese." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1595470695585872.
Full text
40
Patton, William. "Modelling of unequally sampled rock properties using geostatistical simulation and machine learning methods." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2530.
Full textAbstract:
Important orebody characteristics that determine viability of the mineral resource and ore reserve potential such as physical properties, mineralogical and geochemical compositions often vary substantially across an ore deposit. Geometallurgical models aim to capture the spatial relationships between mineral compositions, physical properties of rock and their interactions with mechanical and chemical processes during mining extraction and processing. This characterisation of physical and chemical properties of ores can in turn be used to inform mining and processing decisions that enable the extraction of the maximum value from the ore deposit most efficiently. During the construction of such spatial geometallurgical models, practitioners are presented with many challenges. These include modelling high-dimensional data of various types including categorical, continuous and compositional attributes and their uncertainties. Decisions on how to segregate samples data into spatially and statistically homogeneous groups to satisfy modelling assumptions such as stationarity are often a requirement. Secondary properties such as metallurgical test results are often few in number, acquired on larger scales than that of primary rock property data and non-additive in nature. In this thesis a data driven workflow that aims to address these challenges when constructing geometallurgical models of ore deposits is devised. Spatial machine learning techniques are used to derive geometallurgical categories, or classes, from multiscale, multiresolution, high dimensional rock properties. In supervised mode these methods are also used to predict geometallurgical classes at samples where rock property information is incomplete. Realisations of the layout of geometallurgical classes and the variabilities of associated rock properties are then mapped using geostatistical simulations and machine learning. The workflow is demonstrated using a case study at Orebody H; a complex stratabound Bedded Iron Ore deposit in Western Australia’s Pilbara. A detailed stochastic model of five compositions representing primary rock properties and geometallurgical responses in the form of lump and fine product iron ore quality specifications was constructed. The predicted product grade recoveries are realistic values that honour constraints of the predicted head grade compositions informed by more abundant and regularly spaced sampling than metallurgical tests. Finally, uncertainties are quantified to assess risk following a confidence interval based framework. This could be used to identify zones of high uncertainty where collection of additional data might help mitigate or minimise risks and in turn improve forecast production performances.
41
Meunier-Christmann, Claude. "Geochimie organique de phosphates et schistes bitumineux marocains : etude du processus de phosphatogenese." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13200.
Full textAbstract:
Etude comparative de la fraction lipidique de sediments phosphates de la region des oulad abdoum (maroc) et de schistes bitumineux de la region de timahdite afin de comprendre le processus de phosphatogenese. L'analyse des hydrocarbures satures, insatures et aromatiques et des acides montre l'importance des marqueurs steroides et hopanoides caracteristiques d'une forte activite phytoplanctonique et bacterienne. On montre l'immaturite generale de la matiere organique. On montre que la matiere organique des phosphates est pauvre en composes fonctionnalises par rapport a celle des schistes bitumineux. On l'explique par une activite microbienne prolongee ou par un passage en milieu moins reducteur. Des nouveaux marqueurs biologiques sont identifies: les dammar 13(17)-enes 20r et 20s, le biphytane diacide et une serie de thiophenes acides
42
Henderson, Ian George. "On the social and genetic composition of rook Corvus frugilegus and jackdaw C. monedula flocks." Thesis, University of Leicester, 1989. http://hdl.handle.net/2381/34105.
Full textAbstract:
From December 1985 to December 1988, an study was made of the functional significance of rook and jackdaw flocks with a view to identifying reasons for intra and interspecific flock cohesiveness. Flocks of rooks were investigated by way of behavioural observation for competitive heterogeneity and the impact of such on the dispersion of individual members. Thus, immature and adult birds were compared for their respective abilities to compete within foraging flocks. Evidence for kin selection in foraging flocks was investigated in jackdaws by way of behavioural observation of individually marked (wing tagged) birds and using DNA fingerprinting to ascertain the degree of relatedness between associating individuals. Interspecific associations were studied a) to identify the similarities and differences between foraging rooks and jackdaws and b) to provide hypotheses for functional flocking without cause for genetically related explanations. Immature rooks did not forage as efficiently as adults in larger flocks, and thus selected smaller flocks, with higher immature: adult ratios. Adult interference was a possible cause of immature dispersion. Kin selection was not found to be a significant component of co-foraging groups, though female jackdaws had higher than average levels of relatedness, possibly due to lower female than male dispersal. The daily behaviour of rooks and jackdaws was remarkably similar and 80% of foraging flocks contained both species. Commonly co-occuring food resources, low direct resource competition and subsequent low levels of interspecific aggression were thought responsible for this association. In conclusion, competitive heterogeneity was found in rooks that effected individual dispersion, discouraging young birds rather than encouraging them, to remain within the colony. Likewise little evidence of kin selection was found in foraging jackdaws. Rooks and jackdaws associated together frequently, on the basis, it was suggested, of where one species was feeding, the other was also likely to forage successfully.
43
Kleinfeld, Elizabeth Neuleib Janice. "Dissonance and excess four students' experiences of revision in a composition classroom /." Normal, Ill. : Illinois State University, 2006. http://proquest.umi.com/pqdweb?index=0&did=1276391281&SrchMode=1&sid=3&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1181310403&clientId=43838.
Full textAbstract:
Thesis (Ph. D.)--Illinois State University, 2006.<br>Title from title page screen, viewed on June 8, 2007. Dissertation Committee: Janice Neuleib (chair), Ronald Fortune, Bob Broad. Includes bibliographical references (leaves 270-280) and abstract. Also available in print.
44
Flageole, Janick. "Sm-Nd Isotopic Composition of Mantle-Derived Rocks from the Saglek-Hebron Gneiss Complex, Northern Labrador." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39208.
Full textAbstract:
The Saglek-Hebron Gneiss Complex (SHC) is located in Northern Labrador within the Nain Province. It has recorded multiple magmatic events over more than 1 billion years, making it ideal to study the evolution of mantle-derived rocks through time. Here we present a 147Sm-143Nd isotopic study focussing on the different generations of mantle-derived rocks in the SHC. A total of 83 samples have been analysed, including: 1) mafic metavolcanic rocks; 2) ultramafic rocks divided into two distinct groups (a Fe-rich group enriched in incompatible elements and more depleted ultramafic rocks with lower Fe contents); 3) mafic metamorphosed dikes called the Saglek dikes; and 4) undeformed mafic dikes. Some samples exhibit evidence of post-magmatic geochemical and isotopic disturbance but only the least disturbed samples have been considered to constrain the timing of formation of the different lithologies and the isotopic composition of their mantle source. The mafic metavolcanic rocks combined with the co-genetic low-Fe ultramafic rocks yield an isochron age of 3819 ± 190 Ma (MSWD=34, n=25) with an initial εNd value of +2.3 ± 0.6. The high-Fe enriched ultramafic rocks yield a younger age of 3433 ± 220 Ma (MSWD=10.4, n=10) with an initial εNd= +1.8 ± 0.5. The two generations of mafic dikes appear to have been emplaced in the Mesoarchean and the Neoarchean. The Saglek dikes yield an isochron age of 3565 ±120 Ma (MSWD=1.17, n=10) with an initial εNd value of +1.7 ± 0.1, while the Sm-Nd isochron age for the undeformed mafic dikes is 2694 ±79 Ma (MSWD=3.2, n=21) with an initial εNd value of +1.7 ± 0.1. All generations of mantle-derived rocks yield positive initial εNd values, where only the Eoarchean rocks display an initial Nd isotopic composition similar to the depleted mantle. The Mesoarchean ultramafic rocks, Saglek dikes and Neoarchean mafic dikes display almost identical initial εNd values, despite an age difference of ~800 Ma. This could suggest the contribution of distinct mantle sources or, if all generations of mantle-derived rocks in the SHC were produced from the same mantle source, it implies that this source evolved with a nearly chondritic Sm/Nd ratio for almost the whole Archean Eon. The fact that the initial isotopic compositions of the mantle-derived rocks appear to deviate from the depleted mantle with time, could also suggest an increasing interaction with older evolved crust.
45
Hill, Kristina M. "Diagenetic and compositional controls of wettability in siliceous sedimentary rocks, Monterey Formation, California." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1587286.
Full textAbstract:
<p> Modified imbibition tests were performed on 69 subsurface samples from Monterey Formation reservoirs in the San Joaquin Valley to measure wettability variation as a result of composition and silica phase change. Contact angle tests were also performed on 6 chert samples from outcrop and 3 nearly pure mineral samples. Understanding wettability is important because it is a key factor in reservoir fluid distribution and movement, and its significance rises as porosity and permeability decrease and fluid interactions with reservoir grain surface area increase. Although the low permeability siliceous reservoirs of the Monterey Formation are economically important and prolific, a greater understanding of factors that alter their wettability will help better develop them. Imbibition results revealed a strong trend of decreased wettability to oil with increased detrital content in opal-CT phase samples. Opal-A phase samples exhibited less wettability to oil than both opal-CT and quartz phase samples of similar detrital content. </p><p> Subsurface reservoir samples from 3 oil fields were crushed to eliminate the effect of capillary pressure and cleansed of hydrocarbons to eliminate wettability alterations by asphaltene, then pressed into discs of controlled density. Powder discs were tested for wettability by dispensing a controlled volume of water and motor oil onto the surface and measuring the time required for each fluid to imbibe into the sample. The syringe and software of a CAM101 tensiometer were used to control the amount of fluid dispensed onto each sample, and imbibition completion times were determined by high-speed photography for water drops; oil drop imbibition was significantly slower and imbibition was timed and determined visually. Contact angle of water and oil drops on polished chert and mineral sample surfaces was determined by image analysis and the Young-Laplace equation. Oil imbibition was significantly slower with increased detrital composition and faster with increased silica content in opal-CT and quartz phase samples, implying decreased wettability to oil with increased detrital (clay) content. However, contact angle tests showed that opal-CT is more wetting to oil with increased detritus and results for oil on quartz-phase samples were inconsistent between different proxies for detritus over their very small compositional range. Water contact angle trends also showed inconsistent wetting trends compared to imbibition tests. We believe this is because the small range in bulk detrital composition between the "pure" samples used in contact angle tests was close to analytical error and because small-scale spatial compositional variability may be significant enough to effect wettability. These experiments show that compositional variables significantly affect wettability, outweighing the effect of silica phase.</p>
46
Ndhlovu, Rachel Tintswalo. "Temporal variability in the fatty acid composition of suspension-feeders and grazers on a South African rocky shore." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1020879.
Full textAbstract:
Numerous ecological studies have used lipids to determine trophic pathways in aquatic systems, as fatty acid profiles provide time-integrated information on an organism’s assimilated diet. Many of these studies have, however, been based on sample collections with a limited temporal scale. The trophic ecology of pelagic systems has been studied intensively using fatty acid analyses, but very little work has been directed toward benthic communities, with the intertidal being especially neglected. The investigation of trophic pathways within rocky shore communities will help us to better understand system responses to environmental changes. The determination of long term temporal variation of the food web within a community could reveal the type, magnitude, duration and frequency of highly seasonal productivity. Changes in fatty acid profiles through time in primary consumers of intertidal rocky shores are poorly understood, but represent an important step towards a more comprehensive understanding of rocky shore food webs, compared with those derived from snapshot or short-term studies. The aim of this thesis was to clarify the temporal variability in the diets of rocky shore intertidal suspension-feeders (the brown mussels Perna perna and the Cape reef worm, Gunnarea gaimardi) and grazers (the Cape sea urchin Parencinus angulosus and the Goat-eye limpet, Cymbulus oculus) on the south east coast of South Africa using fatty acid profiles, and to investigate the effects of life style (e.g. feeding mode) and life cycle on temporal variations in tissue fatty acid profiles. I had three hypotheses: firstly, that suspension-feeders experience high levels of variability in their diets through time because water quality has the potential to change quickly and drastically, whereas grazers experience less variability in their diets over time since their food sources are more constant. Secondly, the reproductive cycles of the suspension-feeder P. perna and the grazer P. angulosus affect the fatty acid composition of their gonads, with temporal variations in lipid composition reflecting changes in reproduction investment. Thirdly, the total amount of energetic reserves available for reproduction are different for each gender (females allocate more energy to egg production than males allocate to gamete production). To address these aims, fatty acid profiles of suspension-feeders and grazers were investigated over a period of twelve months (from July 2010 to June 2011) at a single site on the south east coast of South Africa. The results showed high variability in the fatty acid composition of both the suspension-feeders strongly related with changes in their food source (suspended particulate material). Furthermore, similar temporal changes in fatty acid profiles of the two suspension-feeders were observed over time, reflecting their common diet and life style. There were some inter-specific differences in the suspension-feeders, likely originating from differences in their particle capturing mechanisms. Grazers showed less variability through time compared with the suspension-feeders, with the limpets being more consistent than the sea urchins. The temporal variability in the sea urchin diets may have resulted from the highly diverse and heterogeneous food sources available to them, whereas limpets may be more selective and have a limited range of diet items. Differences between the two grazer species may have arose from differences in their feeding strategies and intertidal zonation. The fatty acid compositions of gonad tissues in both P. perna and P. angulosus showed temporal variability strongly related to reproductive cycle. Differences in the fatty acid values between females and males were apparent, with females richer in total and polyunsaturated fatty acids than males. Spawning and gametogenesis influenced the variability of fatty acids through time in both species, suggesting the importance of considering the reproductive cycle when studying lipids in rocky shore species. Little evidence of lipid transfer between muscles and gonads was seen, suggesting the importance of direct lipid storage into the reproductive tissues. The influence of diet and life history of intertidal consumers on the temporal variability of their fatty acid compositions is important to understand, as it provides us with a better understanding of the functioning of rocky shore systems. There is an enormous potential for future research in this field of study.
47
Fekiacova, Zuzana. "Geochronology, geochemistry and isotopic compositions of the volcanic rocks from oceanic (Hawaii) and continental (Eifel) intra-plate environments." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975921134.
Full text
48
Maynard, Annastacia Lin. "Copper isotope compositions of Cenozoic mafic-intermediate rocks of the Northern Great Basin and Snake River plain (USA)." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32881.
Full textAbstract:
Master of Science<br>Department of Geology<br>Matthew E. Brueseke<br>Mid-Miocene epithermal Au-Ag ores of the northern Great Basin USA are related to magmatism associated with the inception of the Yellowstone hotspot. The geochemical chemical connection between these ores and spatially and temporally related volcanism is not well understood, but has been suggested (Kamenov, 2007; Saunders et al., 2015). These Cu- and Pb- isotope studies show that the ore and associated gangue minerals have different sources of Pb, which supports evidence that the metal(loids) originate from a deep magmatic source (Saunders et al., 2008). Cu isotopes as a tool for exploring linkages between ore deposits and related volcanic rocks is a new and evolving field. A suite of mid-Miocene Northern Great Basin (NGB) and Snake River Plain (SRP) volcanic rocks was analyzed by aquaregia leach for their δ⁶⁵Cu compositions. These samples have all been previously characterized and include basalts, trachybasalt, basaltic andesites, and basaltic trachyandesites that are representative of regional flood basalt magmatism and younger basalt eruptions in central Idaho. Included are rocks from the Santa Rosa-Calico volcanic field, NV (e.g., Buckskin-National district); Owyhee Mountains, ID (Silver City District); Midas, NV region, near Jarbidge, NV; and a locality proximal to Steens Mountain, OR. Also included are two Pleistocene basalts from the central Snake River plain unequivocally related to the Yellowstone hotspot volcanism (McKinney Basalt and Basalt of Flat Top Butte), and one Eocene basalt from the Owyhee Mountains that is related to pre-hotspot arc volcanism. International rock standards ranging from ultramafic to intermediate were also analyzed in this study for comparison.
Our new δ⁶⁵Cu data greatly expands the range of known Cu isotopic compositions for basalts, with values ranging from -0.84‰ to +2.61‰. These values overlap with the δ⁶⁵Cu of regional ores, further suggesting a link between the source(s) of the ores and the NGB rocks. The range of δ⁶⁵Cu values also overlaps with mantle rock values, suggesting that the Cu isotopic composition may be a signature derived from the mantle source. Fractionation mechanisms that cause such a broad range in Cu isotopes are still unclear but liquid-vapor transitions and mantle metasomatism are being explored. Furthermore, δ⁶⁵Cu values of international rock standards reported in this study did not agree with previously reported data (Archer and Vance, 2004; Bigalke et al., 2010; Moeller et al., 2012; Liu et al., 2014, 2015) suggesting that aquaregia leach may not be a preferable technique when analyzing volcanic rocks.
49
Voegelin, Andrea. "The molybdenum isotopic composition of carbonate rocks : setup of a novel paleo-redox proxy and its application to geological problems /." [S.l.] : [s.n.], 2009. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000288146.
Full text
50
Bouse, Robin Marie. "Lead isotopic compositions of ore deposition and their host rocks in Arizona: Implications for the crustal inheritance of metals." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187411.
Full textAbstract:
Pb isotopic compositions of twelve Late Cretaceous-Early Tertiary (LC-ET) igneous complexes in Arizona suggest that there are no isotopic distinctions between productive (those that host a porphyry copper deposit) and barren complexes. Pb isotopic compositions of the LC-ET igneous rocks are similar to those of the Proterozoic basement rocks in which they are located and indicate a regional coherence and inheritance of Pb isotopic compositions. Within the LC-ET igneous complexes, there is commonly a decreasing trend in 206Pb/204Pb from the oldest to youngest pluton. In Arizona, the sulfide mineralization in porphyry copper deposits is generally spatially and temporally associated with the youngest plutons. Pb isotopic compositions of the sulfide mineralization suggest that much of the mineralization was deposited from fluids with an isotopic composition similar to the plutons lowest in 206Pb/204Pb, (the younger plutons). The low 206Pb/204Pb values of the younger plutons and sulfide mineralization suggest derivation from a lower crustal source. Not all the sulfide mineralization has the same Pb isotopic composition. Some distal mineralization, later stage mineralization, and mineralization hosted in Precambrian rocks have Pb isotopic compositions higher in 206Pb/204Pb. The higher 206Pb/204Pb suggests that these mineralizing fluids interacted with upper crustal rocks. Ag/Au ratios of LC-ET igneous complexes and Middle to Late Tertiary metallic mineral districts in Arizona geographically correspond to Pb isotopic provinces. Pb isotopic compositions and model Th/U for sulfide mineralization from 50 of the metallic mineral districts mimic regional Pb isotopic trends defined by Early Proterozoic whole rocks. Crustal provinces with Th/U higher or lower than the crustal average (Th/U≅4) have a higher potential for Au-enriched ore deposits. Crustal provinces with Th/U≅4 have a higher potential for Ag-enriched ore deposits. The Pb isotopic data presented here are consistent with the crustal inheritance of metal ratios. Thus, the crustal inheritance hypothesis can be used as a viable exploration technique at the crustal-province scale. Mass spectrometers that also have the capability of rapid elemental analyses (ICPMS) and aeroradiometric data are useful tools for this exploration method.