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Dissertations / Theses on the topic 'Sills (Geology)'

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Published: 4 June 2021
Last updated: 29 July 2024

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1

Van, Boening Angela M. "Petrogenesis and tectonic implications of mafic rocks in the Precambrian core of the Black Hills, South Dakota." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4995.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on November 6, 2007) Includes bibliographical references.
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2

Walker, B. H. "Emplacement mechanism of high-level dolerite sills and related eruptions in sedimentary basins, Fife, Scotland." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382000.

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3

Song, Xieyan, and 宋謝炎. "Geochemistry of permian flood basalts and related ni-cu-(pge) sulfide-bearing sills in Yangliuping, Sichuan province, China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B3124595X.

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4

Dubé, Benoît. "Métallogénie aurifère du filon-couche de Bourbeau : région de Chibougamau, Quebec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1990. http://theses.uqac.ca.

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5

Tremblay, Christian. "Les éléments du groupe du Platine dans le dyke de Méquillon ceinture de Cape-Smith, Nouveau-Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1990. http://theses.uqac.ca.

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6

Robeck, Eric Dean. "The effects of fault-induced stress anisotropy on fracturing, folding and sill emplacement : insights from the Bowie coal mines, southern Piceance basin, western Colorado /." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd760.pdf.

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7

Couture, Jean-François. "Géologie de la formation de Gilman dans la partie centrale du canton de Roy, Chibougamau, Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1986. http://theses.uqac.ca.

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Mémoire (M.Sc.A.)-- Université du Québec à Chicoutimi ; 1986.<br>"Mémoire présenté pour l'obtention du grade de maîtrise es sciences appliquées" CaQCU Document électronique également accessible en format PDF. CaQCU
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8

Schofield, Nick. "Linking sill morphology to emplacement mechanisms." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/798/.

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Mafic sill complexes are increasingly being shown to play a major role in the movement of magma around the upper crust in volcanic terranes and to have a role in mass extinction events in Earth history. Most of the current models of sill emplacement assume that brittle fracture operates at all points of sill emplacement. Within this thesis, a series of observations are presented from sheet intrusions in South Africa, USA and the UK showing that in certain situations, dependent on host rock lithology, the propagation of magma through normal brittle fracture can cease. In this circumstance a pre
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9

Suvanto, K. (Kalle). "Geology of the Pikku-Vaiskonselkä differentiated sill in the Kevitsa area, northern Finland." Master's thesis, University of Oulu, 2014. http://urn.fi/URN:NBN:fi:oulu-201406041682.

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The Pikku-Vaiskonselkä sill, situated in the Kevitsa area, northern Finland, was studied using core logging, field observations, petrography and whole-rock and mineral analysis. The aim of the Master’s project was to describe the intrusion and compare it with other layered intrusions in central Finnish Lapland, including the Kevitsa, Satovaara, Rantavaara intrusions, the Lower Suite of the Koitelainen intrusions, and layered sills the ca. 2.22 Ga gabbro-wehrlite association. The sample material from the Pikku-Vaiskonselkä sill consisted of drillcore samples (drillcores KV300 and KV305) and out
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10

Preston, Robert Jeremy. "The petrogenesis of the Loch Scridain xenolithic sill complex, Isle of Mull." Thesis, University of Glasgow, 1996. http://theses.gla.ac.uk/2089/.

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Intruded into the Palaeocene lava field and underlying Moine (Neoproterozoic) crystalline basement rocks around Loch Scridain, Isle of Mull, Scotland, is a suite of high-level, inclined, xenolithic sheets, ranging in composition from basalt, through andesite and dacite, to rhyolite. These sheets, associated with the Mull central volcano, were emplaced at approximately 58Ma. Three distinct (magma) groups are recognised. Group I consists of fine-grained, aphyric basalts and basaltic andesites, the most primitive of which has MORB-like chemical affinities. Group II predominantly comprises aphyric
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11

Barbosa, Marcos Antônio Depetris. "Influencia termal dos sills de Reserva, Prudentópolis e Irati nas rochas encaixantes da Formaçao Irati no estado do Paraná." reponame:Repositório Institucional da UFPR, 2004. http://hdl.handle.net/1884/43841.

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Orientadora: Eleonora Maria Gouvea Vasconcellos<br>Co-orientador: Sidnei Rostirolla<br>Co-orientador: José Paulo Peccinini Pinese<br>Dissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Ciencias da Terra, Programa de Pós-Graduaçao em Geologia. Defesa: Curitiba, 2004<br>Inclui bibliografia e anexos<br>Área de concentraçao: Geologia exploratória<br>Resumo: As intrusões magmáticas são relevantes na estruturação e acumulação de hidrocarbonetos, uma vez que influenciam a distribuição de estruturas pré-existentes, a geração de novos reservatórios e ainda, favorecem a acumulação e matur
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12

Chau, Kevin Xavier. "Mineral chemistry and origin of the olivine-rich zone of the Palisades sill." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/2116.

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The Palisades Sill contains an olivine-rich zone that has attracted scientific attention for over one hundred years. Despite the amount of focus, a definitive explanation for the origin of this layer has not been reached. Through the use of detailed petrographic analyses and electron microscopy, the aim of this study was to collect data on mineral phases from the Palisades Sill in order to better understand the history. Extremely broad ranges in mineral compositions indicate that the olivine-rich zone evolved through in situ equilibrium crystallization, implying that it was injected once the
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13

Hansen, Dorthe Moller. "3D seismic characterisation of igneous sill complexes in sedimentary basins, North-East Atlantic Margin." Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/55377/.

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This thesis compiles the results of a 3D seismic-based study of the geometry and emplacement mechanics of igneous sills and sill complexes intruded into basins along the NE Atlantic Margin. Dolerite sills were intruded into the Upper Cretaceous and Paleocene mud-dominated sediments of these basins during the Paleocene and Early Eocene, approximately synchronous with the onset of seafloor spreading between NW Europe and Greenland. Detailed interpretation of igneous intrusions in four case-study areas has revealed that sills adopt a wide range of geometries, ranging from near-concordant sheet-li
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14

Jones, Douglas James. "Crustal Architecture of the Snake River Plain, Idaho, Through Geochemical Investigation of Crustal Sill and Shallow Subvolcanic Xenoliths." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5152.

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The Snake River Plain (SRP) in southern Idaho is one of the best preserved examples of continental hotspot tracks. A layered mafic intrusion has been seismically imaged in the mid-crust, however, few geochemical studies have investigated the midcrustal sill complex’s importance in the evolution of SRP magmas. This thesis investigates the geochemistry of 3 xenoliths from a mid-to-lower crustal sill complex sampled from core taken from Kimama, ID, and 3 xenoliths from a shallow sub-volcanic magma chamber beneath the SRP sampled from Sid Butte, ID. Forward modeling and partition coefficient calcu
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15

Manton, Ben. "The mechanics of sill propagation and associated venting, investigated using 3D seismic data from offshore Norway." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/75498/.

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This thesis reports on over 27 sills and 213 associated vents. The sills and vents were investigated using 3D seismic data, in a ~1000 km2 area, offshore Norway between the Møre and Vøring Basins (the Edvarda survey). A wide range of sill geometries are observed which are interpreted to be the result of five different processes acting on the sills. Three of these processes relate to how the host deforms. If sill intrusion causes deformation of the seafloor, creating folds, or the sills interact with folds created by neighbouring sills, sills are found to cross bedding (transgress) abruptly. Al
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16

Bozetti, Guilherme. "Stratigraphy and architecture of a coarse-grained deep-water system within the Cretaceous Cerro Toto formation, Silla Syncline area, southern Chile." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=235577.

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The Upper Cretaceous Cerro Toro Formation, southern Chile, is characterised by thinbedded turbidites that envelope a series of coarse-grained, confined slope complex systems, interpreted as part of the Lago Sofia Member. This deep-water slope system overlies basin floor sheets of the Punta Barrosa Formation, and is overlain by the sand-filled slope channels of the Tres Pasos Formation. Particularly distinctive beds, known as TEDs (transitional event deposits), are up to 40 m thick, laterally extensive, have prominent fluted bases, and have a vertical fabric starting with (1) a thin, inversely-
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17

Silva, Fabiane Domenech. "Mapeamento sísmico de intrusões ígneas na bacia do Amazonas e suas implicações para um modelo não-convencional de geração de hidrocarbonetos." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=4606.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A maioria das bacias paleozóicas brasileiras apresenta matéria orgânica termicamente pouco evoluída nos intervalos correspondentes ao Devoniano. O modelo mais adequado para se entender a geração, migração e acumulação de HC estaria relacionado às fases de intrusão de diabásio. No caso da Bacia do Amazonas, embora tenha havido condições de soterramento suficientes para a geração de hidrocarbonetos, não se deve descartar o modelo não convencional de geração como uma das formas possíveis de dar origem as acumulações comerciais de óleo
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18

Van, Noord Kenrick A. A. "Deep-marine sedimentation and volcanism in the Silverwood Group, New England Fold Belt, Australia." Thesis, Queensland University of Technology, 1999.

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In eastern Australia, the New England Fold Belt (NEFB) comprises an ancient convergent margin that was active from the Paleozoic until the late Mesozoic. Considerable effort has been expended in understanding the development of this margin over the past twenty years. However, proposed tectonic models for the orogen have either been too broad, ignoring contradictory local evidence, or too locally specific without paying attention to the 'big picture'. The research presented in this work addresses the issue of appropriate scale and depth of geological detail by studying the NEFB at the terrane-s
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19

Kattenhorn, Simon Allen. "Mechanisms of sill and dyke intrusion." Thesis, 1994. http://hdl.handle.net/10413/4861.

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Mechanisms of sill and dyke intrusion require an understanding of fracture growth,stress distributions and intensities, dilation,intrusion rates, hydraulic pressure,host-rock effects,en echelon fracture arrays,and flow direction. The methods of previous studies have been applied to natural sill and dyke examples of the Karoo Igneous Province in northern Natal . An en echelon array of Jurassic dolerite sills occurs within Permian Ecca sediments along the Mhlatuze River, west of Empangeni. Dolerite emplacement occurred as two intrusive phases. The first phase resulted in thick, . coarse-grained
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20

Fumerton, Stewart Lloyd. "The felsic intrusives In E.R.P.M., Boksburg." Thesis, 2015. http://hdl.handle.net/10539/17282.

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21

Chisonga, Benny Chanda. "Proterozoic mafic dykes and sills associated with BIF-hosted iron ore, South Africa : implications for the distribution of the Bushveld and Umkondo large igneous provinces." Thesis, 2014. http://hdl.handle.net/10210/9138.

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D.Phil. Geology)<br>This study presents detailed petrographic, mineral-chemical and geochemical characteristics ofmafic intrusions from three iron oremining areas - Thabazimbi, Sishen and Hotazel - in southern Africa In addition, as themafic intrusions at the Thabazimbi, Sishen and Hotazel mines occur in close spatial association with iron and manganese ore, this study addresses the aspect of whether these intrusions have a bearing on the localization of these ores. Precise geochronologic data of these previously undated mafic dykes and sills is presented to classify them into a regional conte
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22

Wabo, Hervé. "Paleomagnetism of post-Transvaal sill complexes, selected dykes and the Uitkomst Complex - relation to the Bushveld Complex." Thesis, 2014. http://hdl.handle.net/10210/8790.

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Ph.D. (Geology)<br>The Paleoproterozoic (i.e. 2500 Ma to 1600 Ma) apparent polar wander path (APWP) for the Kaapvaal craton (KC) is not well constrained, due to the lack of reliable paleopoles and absence of numerical ages for existing poles. In addition, the duration of emplacement, and timing of remanence acquisition of the Rustenburg Layered Suite (RLS) and other units of the Bushveld Large Igneous Province (LIP) are still unclear. During the present paleomagnetic study, samples were collected from the small intrusions that occur around the RLS and that are believed to be related to the Bus
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23

Mealin, Caroline. "Geology, geochemistry and Cr-Ni-Cu-PGE mineralization of the Bird River sill: Evidence for a multiple intrusion model." Thesis, 2008. http://hdl.handle.net/10012/3651.

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The Bird River sill (BRS) is composed of layered mafic-ultramafic intrusive bodies which intruded the Bird River greenstone belt in southeastern Manitoba. Layered intrusions, such as those that collectively make-up the BRS, are important hosts to base and precious metal deposits. This study was initiated to examine and develop an emplacement model for the western half of the BRS and to establish the controls on Cr-Ni-Cu-PGE mineralization. The BRS intrusions were emplaced through multiple-magmatic injections into different stratigraphic levels in the Lamprey Falls Formation. It is interp
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24

Schrader, Christian Michael. "Geochronology and geology of the Pebble Cu-Au-Mo porphyry and the sill Au-Ag epithermal deposits, southwest Alaska." 2001. http://purl.galileo.usg.edu/uga%5Fetd/schrader%5Fchristian%5Fm%5F200112%5Fms.

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25

Ushendibaba, Mhaka. "Using electromagnetic methods to map and delineate high-grade harzburgite pods within the Ni-Cu mineralised Jacomynspan ultramafic sill, Northen Cape, South Africa." Thesis, 2016. http://hdl.handle.net/10539/21007.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science. Johannesburg, 2016.<br>The Jacomynspan Ni-Cu sulphide mineralisation is hosted within a 100m thick steeply dipping tabular, differentiated, sill of mafic to ultramafic composition intruded into country gneissic rocks of the Namaqualand Metamorphic complex. This sill is predominantly composed of tremolite schist (metamorphosed pyroxenite) containing lenticular bodies of harzburgite. The harzburgite generally hosts net-textur
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26

Letourneur, Ludovic. "Structure and Dynamics of Plumbing Systems of Oceanic Shield Volcanoes: An Example from Réunion Island." Doctoral thesis, 2008. http://hdl.handle.net/11858/00-1735-0000-0006-B273-3.

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