Log in

Relevant bibliographies by topics / Earth Sciences - Geology / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Earth Sciences - Geology.

Dissertations / Theses on the topic 'Earth Sciences - Geology'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Earth Sciences - Geology.'

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

Garrick-Bethell, Ian 1980. "Early lunar geology and geophysics." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/47845.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2009.<br>Includes bibliographical references.<br>Despite a number of human and robotic missions to the Moon, there are still important unanswered questions about its early evolution, and how it came to be the object we observe today. Here we use observational, experimental, and theoretical techniques to examine three important events that took place early in lunar history and have left a lasting signature. The first event is the formation of the largest basin on the Moon, the South Pole

APA, Harvard, Vancouver, ISO, and other styles

2

Giles, David. "Computer-based modelling and analysis in engineering geology." Thesis, University of Portsmouth, 2014. https://researchportal.port.ac.uk/portal/en/theses/computerbased-modelling-and-analysis-in-engineering-geology(091c5104-4dbb-4e90-b897-aaf34702100a).html.

Full text

Abstract:

This body of work presents the research and publications undertaken under a general theme of computer-based modelling and analysis in engineering geology. Papers are presented on geotechnical data management, data interchange, Geographical Information Systems, surface modelling, geostatistical methods, risk-based modelling, knowledge-based systems, remote sensing in engineering geology and on the integration of computer applications into applied geoscience teaching. The work highlights my own personal contributions and publications under this theme as well as collaborations and output emanatin

APA, Harvard, Vancouver, ISO, and other styles

3

Koor, Nicholas Paul. "A contribution to slope engineering in Hong Kong : the engineering geology approach." Thesis, University of Portsmouth, 2016. https://researchportal.port.ac.uk/portal/en/theses/a-contribution-to-slope-engineering-in-hong-kong(5d88e719-14fc-4052-8f89-5c4bef50e40c).html.

Full text

Abstract:

Whilst working in Hong Kong from 1993 to 2005, firstly for the Geotechnical Engineering Office of the Hong Kong Government and then for various international consultants, I was involved in a number of important research studies, landslide investigations and construction projects where I was able to make a significant contribution to science, knowledge and practice under the theme of slope engineering. This work was carried out in what I have described as the engineering geology approach which has six interrelated objectives: identification of vulnerable slopes; constraint of slope defect; defi

APA, Harvard, Vancouver, ISO, and other styles

4

O'Neil, Jonathan. "The geology of Nuvvuagittuq greenstone belt and its implications for the early earth's evolution." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66884.

Full text

Abstract:

The Nuvvuagittuq greenstone belt is an Eoarchean/Hadean succession preserved along the eastern coast of Hudson Bay in the Northeastern Superior Province, Quebec, Canada. It is essentially composed of three major lithological units: 1) mafic cummingtonite-amphibolite, known as the "faux-amphibolite", which is the dominant lithology of the belt, 2) ultramafic and mafic sills that intrude the faux-amphibolite, and 3) chemical sedimentary rocks comprising a banded iron formation (BIF) and a silica-formation. The faux-amphibolite has a basaltic to andesitic composition. It is comp

APA, Harvard, Vancouver, ISO, and other styles

5

Schuh, Wolfram Dieter, and Wolfram Dieter Schuh. "Geology, geochemistry, and ore deposits of the Bau gold mining district, Sarawak, Malaysia." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/187561.

Full text

Abstract:

District-scale zoning of ore deposits and structural-tectonic setting of Bau was investigated. Regional tectonic studies, structural analysis, and field mapping complemented by aeromagnetic interpretation were integrated to a structural model of Bau. Ores were studied with optical and electron microscopy, followed by major and trace element, fluid inclusion, and lead and sulfur isotope analyses. In the Late Triassic, Bau was in an island arc - back-arc basin environment Following Early Jurassic deformation and uplift, an active margin developed. Subduction of the West Pacific oceanic plate und

APA, Harvard, Vancouver, ISO, and other styles

6

Swanson, Erika (Erika M. ). "Cenozoic extensional features in the geology of central mainland Greece." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45789.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2008.<br>Includes bibliographical references (leaves 16-17).<br>The Hellenides of Greece have undergone a series of extensional deformation events from early Miocene to present time. Two of the fault systems that accommodate this deformation in central Greece are the Itea-Amfissa detachment and the Parnassos detachment. The Itea-Amfissa detachment is known to have been active during Middle Miocene (Langhian and Serravallian time) from dating of marine sediments within the syn-tectonic han

APA, Harvard, Vancouver, ISO, and other styles

7

Walker, John. "Ground-Level Ozone Across Kentucky: Modeling and a Synoptic Analysis of High Concentrations." TopSCHOLAR®, 2007. http://digitalcommons.wku.edu/theses/385.

Full text

Abstract:

Rural areas are often more susceptible to high concentrations of ground-level ozone (O3) than urban areas. However, rural populations are, for the most part, unaware of this problem. Currently the rural areas of Kentucky have no daily forecast for O3. This research addresses the issue by using methodologies from previous Kentucky O3 modeling research to develop a daily forecast model within Geographic Information Systems. The rural O3 model developed by Kendrick (2005) will be used in this research, as a Standard model, along with an application of the model introduced by Cobourn and Hubbard (

APA, Harvard, Vancouver, ISO, and other styles

8

Schoefernacker, Scott. "Spatial Characteristics of Paleochannels in Association with the Mississippian/Pennsylvanian Systematic Boundary in Western and South-Central Kentucky." TopSCHOLAR®, 2006. http://digitalcommons.wku.edu/theses/261.

Full text

Abstract:

The basal Pennsylvanian Caseyville Formation of south-central Kentucky includes an extensive network of paleochannels, which unconformably overlie various Mississippian (Chesterian Series) rocks. Questions have been raised about the extent and orientation of paleochannels and the systemic boundary in the region. The problematical systemic boundary is quite significant in cases where marker beds are lacking or where sandstone facies of Pennsylvanian age are juxtaposed on lithologically similar Mississippian-age strata. Discerning the systemic boundary may also be complicated by facies changes i

APA, Harvard, Vancouver, ISO, and other styles

9

DiFrenna, Vincent J. "Effect of scaling on hydraulic conductivity in a Karst Aquifer." FIU Digital Commons, 2005. http://digitalcommons.fiu.edu/etd/2819.

Full text

Abstract:

Hydraulic conductivity was determined for samples from the Biscayne Aquifer in Miami Florida at bench and field scales. Hydraulic conductivity values obtained were examined for increase due to scale and for anisotropy. Bench scale testing was performed on Key Largo Limestone cubes for total porosity, effective porosity, and hydraulic conductivity. Total porosity was determined by drying and weighing, while effective porosity was determined by submersion. Hydraulic conductivity was determined in a permeameter for each axis of each cube. Field scale testing of hydraulic conductivity was performe

APA, Harvard, Vancouver, ISO, and other styles

10

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

11

Dausman, Alyssa Marie. "Quantifying the effects of temperature and concentration on variable-density flow in numerical modeling of groundwater systems : implications for predictive uncertainty and data collection." FIU Digital Commons, 2008. http://digitalcommons.fiu.edu/etd/2740.

Full text

Abstract:

Groundwater systems of different densities are often mathematically modeled to understand and predict environmental behavior such as seawater intrusion or submarine groundwater discharge. Additional data collection may be justified if it will cost-effectively aid in reducing the uncertainty of a model's prediction. The collection of salinity, as well as, temperature data could aid in reducing predictive uncertainty in a variable-density model. However, before numerical models can be created, rigorous testing of the modeling code needs to be completed. This research documents the benchmark test

APA, Harvard, Vancouver, ISO, and other styles

12

Girard, Guillaume. "The dynamics of post-collapse magmatism at rhyolitic calderas: analogue experiments and geochemistry of Yellowstone lavas." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40738.

Full text

Abstract:

The dynamics of magma replenishment in silicic magma reservoirs are not well understood. This is an important issue, since replenishment may lead to the rapid accumulation of large volumes of crystal-poor magma, a condition potentially leading to cataclysmic caldera-forming eruptions. To shed light on this process, I have undertaken a combined experimental – geochemical approach designed to provide an integrated and synthetic view of magma replenishment processes. Scaled analogue experiments show that in silicic systems, buoyant injections rise through a magma reservoir without significant mix

APA, Harvard, Vancouver, ISO, and other styles

13

Keppie, Duncan Fraser. "Subduction erosion processes with application to southern Mexico." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66705.

Full text

Abstract:

Finite-element numerical models of ocean-continent subduction are used to investigate the roles of crustal frictional strength, subduction angle, and convergence rate in subduction erosion processes. These models exhibit two distinct modes of subduction erosion: (1) slow and steady, removing small blocks of material continually, and (2) fast and non-steady, removing a large forearc block in a single event. The slow mode, called edge-weakening subduction erosion, is enhanced by steeper subduction angles but acts to shallow the subduction angle at crustal depths. The fast mode,

APA, Harvard, Vancouver, ISO, and other styles

14

Suttner, Wayne C. "Glacial dispersal of gold and arsenic from an unknown source near Wheatcroft Lake, Manitoba, including reference to overlaying Lake Agassiz clay." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61771.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Poirier, Glenn Gerard. "Structure and metamorphism of the eastern boundary of the Labrador trough near Kuujjuaq, Quebec, and its tectonic implications." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61780.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Scher, Samantha. "Fumarolic activity, acid-sulfate alteration and high- sulfidation epithermal precious metal mineralization in the crater of Kawah Ijen volcano (Java, Indonesia)." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110439.

Full text

Abstract:

High-sulfidation epithermal deposits are genetically associated with calc-alkaline volcanism in subduction zones, and although these ore deposits are excellent places to focus research, subduction zone stratovolcanoes provide important windows on magmatic-hydrothermal processes that are not available from study of the corresponding ore deposits. There is general agreement that the hydrothermal alteration accompanying the high-sulfidation epithermal ores is the product of volcanic degassing, however, there is considerably less agreement on the nature and origin of the ore fluid. Opinion is divi

APA, Harvard, Vancouver, ISO, and other styles

17

Brosseau-Liard, Alexandre. "The nature and origin of REE and associated rare metal mineralization in the B-Zone at Strange Lake, Québec." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110644.

Full text

Abstract:

The Strange Lake rare-metal (Zr, REE, Nb, Be) deposit on the border of Québec and Labrador, Canada, contains a large resource of zirconium, rare earth elements and niobium. Much of the potentially economic mineralization was concentrated by magmatic processes, with additional remobilization of REE by hydrothermal fluids. The alkaline granite pluton (1240 ± 2 Ma; Miller et al., 1997) intruded along the contact between an Elsonian quartz monzonite massif in the southwest and paragneisses of Hudsonian age in the northeast.Much of the rare metal mineralization occurs in pegmatite lenses in the su

APA, Harvard, Vancouver, ISO, and other styles

18

Mann, Crystal. "Magma chamber dynamics at Soufrière Hills volcano, Montserrat." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=94980.

Full text

Abstract:

Implicit in active, steady-state magmatic systems is their persistent activity and unchanging behavior in terms of composition and eruptive styles. The ongoing eruption (July 1995 April 2010) of the Soufrière Hills volcano (SHV), Montserrat, provides an ideal setting for understanding this steady-state behavior. Mafic enclaves are ubiquitous in andesitic magma erupted from SHV. The mafic enclaves are basalt to basaltic andesite (49 56 wt. % SiO2) in composition. Based on their chemistry, mineralogy and petrology, they are divided into three types. Prior to intrusion, basaltic magma underwe

APA, Harvard, Vancouver, ISO, and other styles

19

Kitayama, Yumi. "Iron-rich alkaline magmatism in the Archean Schreiber-Hemlo greenstone belt, Ontario, Canada." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110523.

Full text

Abstract:

The finding of Fe-rich picritic basalts in the Gusev Crater on Mars has stimulated interest in Fe-rich magmatism on the early Earth. A significant number of occurrences of ferropicrite magmatism have been identified in Archean terranes, and a study of their mineralogy and setting may provide insights into the petrogenesis of Martian ferropicrites. One of the best exposed of these terrestrial ferropicrites occurs in the Pulpwood Harbour sequence of the Heron Bay volcanics (~2.6-2.7Ga) in the Schreiber-Hemlo Greenstone Belt of the Superior Province of Canada. The ferropicrite bodies consist larg

APA, Harvard, Vancouver, ISO, and other styles

20

Helt, Kayla. "The Canadian Malartic deposit: an example of oxidized, intrusion-related gold mineralization in the Abitibi greenstone belt, Québec, Canada." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110674.

Full text

Abstract:

The Canadian Malartic deposit is Canada's largest producing gold mine, with a resource of 17.6 million ounces gold, and is an example of oxidized intrusion-related gold mineralization in the Archean Abitibi greenstone belt of Québec. The deposit hosts fine-grained, disseminated native gold and subordinate gold telluride minerals, which are accompanied by pyrite and minor fine-grained chalcopyrite, galena, sphalerite, hematite, molybdenite and a suite of Ag-Pb-Bi-bearing telluride minerals. Ore minerals occur in altered wall rock and early quartz-carbonate ± albite ± biotite veins, which are co

APA, Harvard, Vancouver, ISO, and other styles

21

Goldstein, Shoshana. "The petrogenesis and mantle source of Archean ferropicrites from the Western Superior Province, Ontario, Canada." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18783.

Full text

Abstract:

ABSTRACT The significance of Archean ferropicrites has been underappreciated in the past because many have been misidentified as varieties of komatiites. Ferropicrites from the Western Superior Province have distinctly higher Fe contents compared to komatiites at similar Mg contents. Enrichment in Ti, HFSE, and REE, combined with fractionated trace element profiles, indicate that these magmas are derived from a trace element enriched mantle source, which was distinct from that of komatiites. Interpolation of 5 GPa melting experiments on pyrolite and Martian mantle compositions indicates tha

APA, Harvard, Vancouver, ISO, and other styles

22

Simonetti, Antonio. "The geochronology of acadian plutonism in Southern Quebec /." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61761.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Maharaj, Laura. "Investigating proglacial groundwater systems in the Quilcayhuanca and Yanamarey Pampas, Cordillera Blanca, Peru." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104647.

Full text

Abstract:

High-elevation Andean water storage is extremely important for water resources for the arid western coast of South America. Pampas (a subset of pàramos) are a freshwater reservoir in the Cordillera Blanca, Peru. These organic-rich clay systems buffer stream and river runoff to the Rio Santa and provide water to surrounding communities. More than 50% of dry season discharge from pampas is groundwater derived, however little is known about their geomorphology and subsurface sedimentology. Watertable measurements, streambed temperature sensors, and ground penetrating radar (GPR) were used to char

APA, Harvard, Vancouver, ISO, and other styles

24

Sheard, Emma. "Behaviour of zirconium, niobium, yttrium and the rare earth elements in the Thor Lake rare-metal deposit, Northwest Territories, Canada." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92260.

Full text

Abstract:

The Thor Lake rare-metal (Zr, Nb, Y, REE, Ta, Be, Ga) deposit in the Northwest Territories of Canada represents one of the largest resources of zirconium, niobium, yttrium and the heavy rare earth elements in the world. Much of the potentially economic mineralization was concentrated by magmatic processes. However, there is also evidence of remobilization of Zr, Y and REE by hydrothermal fluids. Geologically, the deposit is situated at the southern edge of the Slave Province of the Canadian Shield, within the 2150 Ma alkaline to peralkaline Blachford Lake Complex (Davidson, 1978).<br>The ra

APA, Harvard, Vancouver, ISO, and other styles

25

Wilcock, Jack. "Magmatic recharge during formation and resurgence of the Valles caldera, New Mexico, USA: evidence from quartz compositional zoning and geothermometry." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95220.

Full text

Abstract:

The Valles caldera complex in north-central New Mexico, USA, represents the type example of resurgent caldera system, characterised by eruption of two voluminous high-silica rhyolite ignimbrites (the Otowi and Tshirege Members of the Bandelier Tuff) at 1.608 ± 0.010 Ma and 1.256 ± 0.010 Ma, respectively. Refined dating has shown that resurgence occurred shortly after eruption of the Tshirege, or Upper Bandelier Tuff (UBT). Central resurgence of ~1000 m was accompanied by small-volume eruptions of the Deer Canyon Rhyolite, followed closely by the Redondo Creek Rhyodacite. The Cerro del Medio Rh

APA, Harvard, Vancouver, ISO, and other styles

26

Nadeau, Olivier. "The behaviour of base metals in arc-type magmatic-hydrothermal systems - insights from Merapi volcano, Indonesia." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104612.

Full text

Abstract:

Porphyry and high sulfidation epithermal ore-forming systems are genetically associated with calc-alkaline volcanism in subduction zones, and where erosion has not been too deep, the volcanic rocks are still commonly exposed in close proximity to the deposits. Most models for porphyry copper and high sulfidation epithermal gold systems include a shallow magmatic reservoir (the porphyry stock), an overlying hydrothermal cell, its alteration paragenesis and a stratovolcano. Some investigations also discuss the importance of underlying granitoid batholiths as feeders for porphyry stocks and their

APA, Harvard, Vancouver, ISO, and other styles

27

Dolansky, Lila. "Controls on the genesis of hydrothermal cobalt mineralization: insights from the mineralogy and geochemistry of the Bou Azzer deposits, Morocco." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18693.

Full text

Abstract:

The cobalt deposits at Bou Azzer, Morocco, represent an unusual type of mineralization and an important source of cobalt to the global economy. The orebodies are distributed along the borders of Neoproterozoic serpentinite massifs and consist predominantly of (Co,Ni,Fe) arsenides and sulpharsenides, with accessory sulphides and gold in a quartz-carbonate gangue. The ore minerals were deposited from acidic (pH<5), highly saline brines (~36-51 wt. % NaCl + CaCl2 eq.) under moderately reducing conditions, at temperatures of ~200-400C and pressures of more than 880 bars. The metals were leached

APA, Harvard, Vancouver, ISO, and other styles

28

Resnick, Jonah. "Petrogenesis of the Paleogene Sloko Lake Volcanic Complex Northwestern British Columbia and applications for early tertiary magmatism in the Coast Plutonic Complex." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19707.

Full text

Abstract:

The Sloko Lake Volcanic Complex (SLVC) is the largest erosional remnant (600 km2 in area) of a Paleogene volcanic complex within the northern Canadian Cordillera. It is located along a linear trend of volcanic and plutonic rocks that once formed part of a widespread continental volcanic arc that extended from west-central British Columbia into southeastern Alaska and the southwestern Yukon Territory. The preserved stratigraphy within the SLVC is 1500 m thick, consisting of flat to gently dipping volcanic and pyroclastic flows, with minor well-bedded epiclastic strata that were likely deposited

APA, Harvard, Vancouver, ISO, and other styles

29

Rosa, Daniel. "The sheet of impact melt at West Clearwater Lake, Northern Quebec." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107581.

Full text

Abstract:

The meteorite impact that formed the 32-km-wide Upper Pennsylvanian (285 ± 23 Ma) West Clearwater structure, situated about 125 km east of the Hudson Bay arc, northern Quebec, formed a sheet of impact melt now exposed on a central ring of islands. Crater-fill deposits exposed on the ring of islands can be divided into three major successive units, which are, in ascending order: 1) a red, friable impact-melt-bearing fragmental breccia 0 to 20 m thick cut by small (cm to dm) dykes of impact melt; 2) a red, massive, clast-rich impact-generated melt about 18 meters thick containing up to 25% clas

APA, Harvard, Vancouver, ISO, and other styles

30

McCullagh, Timothy. "Investigating the controls on production from a basin-centered gas accumulation: lower cretaceous cadotte member, Deep Basin Alberta." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18668.

Full text

Abstract:

This thesis examines the controls on gas production from a Cretaceous sandstone deposit located within the Deep Basin of Alberta, Canada. By integrating core, wireline log, 3-D seismic, petrophysical, pressure and production data, we show that the best production comes from permeable chert-rich shoreface and beachface sandstones separated laterally and cyclically by tighter quartzose sandstones. The physical properties of the two lithologies are sufficiently different that they can be distinguished seismically; a map of seismic amplitudes for the Cadotte shows curvilinear high-amplitude anom

APA, Harvard, Vancouver, ISO, and other styles

31

Mloszewski, Aleksandra. "Environmental and microstructural controls of short-term shell degradation in temperate, macrotidal environments." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40807.

Full text

Abstract:

Depositional conditions early post-mortem influence net shell alteration prior to fossilization. This study assesses the progressive degradation of experimentally deployed Mytilus edulis shells and natural aragonite crystals during 13 months at and 10 - 20 cm below the sediment surface in High- and Mid-Marsh Salt Marsh Ponds, a Beach and a Cove (Bay of Fundy, NB, Canada). Changes in net weight, macroscopic, and microstructural features are examined in the context of environmental conditions. Results show that: 1) early degradation processes act very quickly, causing significant changes in shel

APA, Harvard, Vancouver, ISO, and other styles

32

Rancourt, André. "Guidelines for preliminary design of unlined pressure tunnels." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95091.

Full text

Abstract:

Pressure tunnels are used to convey water to hydroelectric powerhouses. Usually each project has a forebay reservoir, an intake, a pressurized tunnel, a surface or underground powerhouse and a tailrace tunnel or channel. This thesis deals with the design of unlined pressure tunnels. These were first driven by the Norwegians in hard granitic rock masses, which would constitute the ideal material for this type of structure. However the increase in demand for electrical energy has pushed the industry to implement projects in sites with less favourable geological conditions all over the world. For

APA, Harvard, Vancouver, ISO, and other styles

33

Maisonneuve, Melissa. "Constraining the nature of E- and N- type components in the Baffin Island picrites using olivine-hosted melt inclusions." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114325.

Full text

Abstract:

The Baffin Island picrites are interpreted to represent primitive magmas (up to ~22 wt % MgO) that are minimally changed since leaving their mantle source and thus provide important insights into our understanding of high-MgO primary magmas and the heterogeneity of their mantle sources. In this study of olivine-hosted melt inclusions, the ratio of potassium to titanium (K/Ti) is used as a probe for the mantle source as both these elements are incompatible in olivine and plagioclase, K/Ti behaves in a similar manner to La/Sm and remains unaffected by crystal fractionation. We define depleted gl

APA, Harvard, Vancouver, ISO, and other styles

34

King, Julia. "A vapour-dominated high-sulphidation system: geology, alteration and mineralization of the hypogene Au (Ag-Cu) Bowone and Binebase deposits, Sangihe Island, Indonesia." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114467.

Full text

Abstract:

The Bowone and Binebase Au (Ag-Cu) deposits are related prospects, located 1 km apart on the volcanic island of Sangihe, Northeastern Indonesia. The deposits occur at the southern and oldest end of the island, and are hosted in Quaternary volcanic and volcaniclastic formations. Each deposit has a supergene and hypogene mineralized zone, although only the supergene zone of the Binebase deposit is of significant thickness. This thesis focuses on the hypogene zones of the deposits, and was undertaken with the goal of understanding the formation of high-sulphidation epithermal precious metal (Au,

APA, Harvard, Vancouver, ISO, and other styles

35

Petrella, Laura. "The nature and origin of REE mineralization in the Misery syenitic intrusion, Northern Québec, Canada." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114595.

Full text

Abstract:

As a result of the recent increase in demand for the rare earth elements, the newly discovered Misery syenitic intrusion is attracting considerable exploration interest. This REE-Zr-Nb prospect is located 200km east of Schefferville and 70km south of Strange Lake in Québec, Canada. It is a 6km wide, ring-shaped intrusion conspicuous on aeromagnetic maps that was emplaced within the Mistastin Batholith, a large Elsonian age granitoid body, which intrudes Paleoproterozoic rocks of the Churchill Province. The Misery intrusion displays a gradational contact with its host, the Misastin rapakivi gra

APA, Harvard, Vancouver, ISO, and other styles

36

Hodson, Keith. "Morphology, exhumation, and Holocene erosion rates from a tropical glaciated mountain range: the Cordillera Blanca Peru." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114578.

Full text

Abstract:

Both tectonics and climate profoundly influence orogenisis, but specifics regarding the forcings, interactions and feedbacks are still largely unclear. This study addresses the evolution of the Cordillera Blanca Mountain Range of northern Peru: an elevated, high-relief, 200 km long string of glaciated peaks comprising the spine of the Andes. Extension along the Cordillera Blanca Detachment Fault (CBDF) actively produces relief along the western flank of the range, exceeding several kilometers in many areas. Abundant records of past glaciations span from >440 ka to the present in the form of

APA, Harvard, Vancouver, ISO, and other styles

37

Kamel, Sherif Kamal. "Experimental and numerical investigations of the impact of erosion voids on rigid pipes." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114121.

Full text

Abstract:

The design of buried pipes requires the consideration of full contact between the pipe and the surrounding soil. After installation, loosening of surrounding soil may occur with time leading to the development of erosion voids next to the pipe wall. This phenomenon is known as ground support loss and has been known to cause pipe damage and in some cases has lead to complete failure. Previous studies were limited to numerical modeling using two-dimensional analyses. The main objectives of the present research program are: (1) to experimentally study the impact of erosion void located next to th

APA, Harvard, Vancouver, ISO, and other styles

38

Majnoon, Mohadeseh. "Metamorphic evolution, mineral chemistry and thermobarometry of the Ujaraaluk unit in the Nuvvuagittuq greenstone belt, northern Canada." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117125.

Full text

Abstract:

The dominant lithologies of the Nuvvuagittuq Greenstone belt (Northeastern Superior Province, Canada) are composed of mafic amphibolite-facies rocks (referred as the Ujaraaluk unit). With a minimum age of 3.8 Ga and possibly as old as 4.3 Ga, these rocks are among the oldest in the world. The Nuvvuagittuq Greenstone belt occurs in the western Hudson Bay terrane, which was last pervasively metamorphosed at ca. 2.7 Ga. In the Ujaraaluk unit, petrography and mineral chemistry study reveal two different rock types: garnet + biotite + plagioclase + quartz schist without amphibole (garnet schist), o

APA, Harvard, Vancouver, ISO, and other styles

39

Sinaei-Esfahani, Fahimeh. "Localized metasomatism of Grenvillian marble leading to its melting, autoroute 5 near Old Chelsea, Québec." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117148.

Full text

Abstract:

The recent (2009) opening of an extension of Autoroute 5 north of Old Chelsea, Quebec, has produced striking road cuts over a length of 2 km, with a wide variety of rock types and a very complex and bewildering juxtaposition of igneous, metamorphic, and metasomatic assemblages of minerals. The focus here is on the mineralogy of the "regional" white marble; it is compared to calcite-dominant rocks, orange, pink, yellow, and blue in color. The orange to pink calcite is dominant in phenocryst-bearing dikes with a selvage of euhedral crystals of diopside. pargasite, phlogopite, titanite and beta

APA, Harvard, Vancouver, ISO, and other styles

40

Hryciuk, Matthew. "Host-rock contamination and sulfide immiscibility in the Franklin large igneous province, Victoria Island, Canada." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117166.

Full text

Abstract:

Contamination in the intrusive plumbing system of large igneous provinces (LIPs) by country rocks can lead to sulfide immiscibility, which is a vital step in the formation of nickel-copper-platinum group element (PGE) ore deposits. On Victoria Island, arctic Canada, exceptional preservation enables the relationships between sills and dikes of the Neoproterozoic Franklin LIP and their host sedimentary rocks to be studied in detail. We use sulfur isotope values and major and trace elements concentrations of intrusions and host rocks and Fe-Ti oxide oxybarometry of intrusions to evaluate contamin

APA, Harvard, Vancouver, ISO, and other styles

41

Islas, Joseph. "Identification, Characterization and Analysis of Wrench Related Faulting in Southwestern Warren County, Kentucky." TopSCHOLAR®, 2006. http://digitalcommons.wku.edu/theses/282.

Full text

Abstract:

Warren County, Kentucky is located south of the southern boundary of the Rough Creek Graben marked by the Pennyrile fault system. The Pennyrile fault system is a regional southwest-northeast trending fault system that extends into Kentucky from the Reelfoot rift zone. The Rough Creek fault system bounds the northern arm of the Rough Creek Graben and trends northwest-southeast also extending from the Reelfoot rift zone. The Rough Creek fault system is related to the Shawneetown fault system in southeastern Illinois and occupies the southern end of the Illinois Basin. The East Continent Rift Bas

APA, Harvard, Vancouver, ISO, and other styles

42

Borowski, Robert. "Understanding the tectonics of archean Gneisses in the western Wabigoon terrane: evidence from the Dashwa, Gneiss, Atikokan, Ontario." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121491.

Full text

Abstract:

The granite – greenstone terranes in northwestern Ontario contain oval granitoid bodies. A specific granitoid body known as the Dashwa Gneiss was studied and the results are presented in this paper. The rocks in the field area display key features of diapirism that include concentric, steeply dipping foliations, radially distributed lineations and a shear zone bounding the granitoid that consistently shows 'granitoid up' kinematics relative to surrounding metavolcanic rocks. Based on these structural features, it is proposed that the oval map pattern of this region resulted from diapirism of t

APA, Harvard, Vancouver, ISO, and other styles

43

Durand, Sedelia Rodriguez. "Origin of the Grande Ronde Formation flows, Columbia River Flood Basalt Group." FIU Digital Commons, 2006. http://digitalcommons.fiu.edu/etd/3105.

Full text

Abstract:

Lavas belonging to the Grande Ronde Formation (GRB) constitute about 63% of the Columbia River Basalt Group (CRBG), a flood basalt province in the NW United States. A puzzling feature is the lack of phenocrysts (< 5%) in these chemically evolved lavas. Based mainly on this observation it has been hypothesized that GRB lavas were nearly primary melts generated by large-scale melting of eclogite. Another recent hypothesis holds that GRB magmas were extremely hydrous and rose rapidly from the mantle such that the dissolved water kept the magmas close to their liquidi. I present new textural and c

APA, Harvard, Vancouver, ISO, and other styles

44

Chavez, Daniel. "Groundwater potential of pampa aquifers in two glacial watersheds, Cordillera Blanca, Peru." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119692.

Full text

Abstract:

As climate change continues to drive glacier retreat in the Cordillera Blanca, Peru, the fraction of dry season runoff derived from groundwater baseflow is increasing. Therefore, it is necessary to improve our understanding of proglacial hydrogeology to forecast how groundwater can offset decreasing meltwater resources. Unfortunately, little is known about high-elevation groundwater, the physical hydrogeological properties of aquifers, or contributions to stream flows in the Cordillera Blanca, Peru. This thesis addresses these knowledge gaps and presents the results from a groundwater inves

APA, Harvard, Vancouver, ISO, and other styles

45

Ghosh, Kajari. "Characterizing fracture distribution in layered rocks using geographic information system-based techniques." FIU Digital Commons, 2003. https://digitalcommons.fiu.edu/etd/3932.

Full text

Abstract:

Fractures are discrete planar features that are heterogeneously distributed throughout the earth's upper crust. Methods commonly used to quantify fracture populations typically yield singular values/indexes for the attribute of interest. These values are useful in characterizing the bulk properties of a fracture population, but are unable to address the inherent spatial heterogeneities of the fracture network. This study explores techniques to map fractures and capture the spatial heterogeneity of fracture networks within a Geographic Information System (GIS). The study was performed on exposu

APA, Harvard, Vancouver, ISO, and other styles

46

Pelechaty, Shane Mitchell. "The Vendian-Cambrian system of Siberia : correlation, tectonics and petroleum geology." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10716.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1997.<br>Includes bibliographical references (p. 225-228).<br>by Shane Mitchell Pelechaty.<br>Ph.D.

APA, Harvard, Vancouver, ISO, and other styles

47

Robison, Robert M. "The Surficial Geology and Neotectonics of Hansel Valley, Box Elder County, Utah." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/4865.

Full text

Abstract:

Hansel Valley, located at the north end of the Great Salt Lake in Box Elder County, Utah, has exposures of the lacustrine sediments of the Little Valley, Bonneville, and Gilbert lake cycles. A 1:50,000 scale map was constructed of the surface geology. Although no trenches were dug for this study, about 240m of logs were compiled in an arroyo in lake bottom sediments. Sediments from at least three lake cycles were found in this gully: 1) compact bottom deposits from the Little Valley cycle; 2) bottom sediments from an intermediate cycle (the Hansel Valley cycle); and 3) beach gravel and bottom

APA, Harvard, Vancouver, ISO, and other styles

48

Swift, Stephen Atherton. "Cenozoic geology of the continental slope and rise off western Nova Scotia." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/58016.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and Woods Hole Oceanographic Institution, 1986.<br>Microfiche copy available in Archives and Science<br>Includes bibliographies.<br>by Stephen Atherton Swift.<br>Ph.D.

APA, Harvard, Vancouver, ISO, and other styles

49

Klepacki, David Walter. "Stratigraphy and structural geology of the Goat Range Area, Southeastern British Columbia." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/14785.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1987.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN. MIT's copy accompanied by maps in separate folder.<br>Bibliography: leaves 256-268.<br>by David Walter Klepacki.<br>Ph.D.

APA, Harvard, Vancouver, ISO, and other styles

50

Pearce, T. J. "Geology, sedimentology, geochemistry and provenance of Late Quaternary turbidites, Madeira Abyssal Plain." Thesis, Kingston University, 1991. http://eprints.kingston.ac.uk/20555/.

Full text

Abstract:

The Madeira Abyssal Plain (MAP) consists of three connected sub-basins, the deepest lying at around 5400m. Late Quaternary sediments consist of very poorly graded metre-scale mud-dominated turbidites with thin decimetre-thick sand/silt basal facies, interbedded with centimetre-thick pelagic clays, marls or oozes. Individual turbidite basal facies commonly display a complex repetition of sand/silt to mud fining upwards packages generally separated by synsedimentary deformational shear structures. Sedimentological, mineralogical and geochemical data demonstrate that MAP turbidites differ from 'm

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!