Browsing Geology (Theses and Dissertations) by Title
Now showing items 89-108 of 121
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Quantitative studies of rock fabrics and textures in layered mafic intrusions of the British tertiary igneous province : implications for magma system emplacement and evolution
(Trinity College (Dublin, Ireland). Department of Geology, 2007)This thesis examines and considers the processes which led to magmatic layering and associated planar and linear fabrics in mafic and ultramafic rocks of four igneous centres of the British (and Irish) Palaeogene Igneous ... -
Rare earth elements in olivine:determination, occurrence and behaviour
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)Olivine is a widely occurring mineral that offers great potential for improving our understanding of geological processes. Olivine is present across a range of geologically significant settings, occurring in stony-iron ... -
Recognition of abnormal thermal histories of Jurassic source rocks from integrated analyses of vitrinite reflectance and organic matter colour / fluorescence
(Trinity College (Dublin, Ireland). Department of Geology, 2002)By investigating three sedimentary horizons through the aureole of a Tertiary dyke intruding a Middle Jurassic sedimentary section in NE Skye, the thermal response rates of the various organic maturity indicators to ... -
Refinement of high-spatial resolution U-Pb geochronological methodologies
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)Zircon [ZrSiO4] is a naturally occurring mineral commonly used in geochronological, isotope and elemental geochemical studies. It can form as an accessory phase in a wide variety of magmatic and metamorphic conditions and ... -
Regional-scale structure and dynamics of the crust, upper mantle and transition zone from waveform tomography with massive datasets
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)In the last decade, the number of seismic stations deployed globally increased dramatically, allowing to construct tomographic models with increasing resolution. Seismic data coverage however, is not homogeneous across the ... -
Sedimentology analysis and correlation of the Mullaghmore sandstone formation in the north and north-west of Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2003)The aims of this study were to provide a sedimentological analysis and environmental interpretation for the Mullaghmore Sandstone Formation and its equivalents, extending from south Donegal to south Sligo and into the north ... -
Sedimentology and stratigraphy of the Carboniferous Donegal Basin
(Trinity College (Dublin, Ireland). Department of Geology, 2000)The Dinantian onshore Donegal Basin is situated at the northerly exposed margin of the Northwest Carboniferous Basin of Ireland. Subsidence patterns in the Northwest basin were strongly controlled by an existing template ... -
Sedimentology, chemostratigraphy, and geochronology of the lower Huqf Supergroup, Oman
(Trinity College (Dublin, Ireland). Department of Geology, 2002)The lower part of the Huqf Supergroup, comprising the Abu Mahara Group and the Hadash and Masirah Bay Formations of the Nafun Group, forms the oldest deposits exposed in Oman. This thesis is based on field study of this ... -
Seismic structure and anisotrophy in southern Africa's lithosphere : constraints from broad-band surface-wave dispersion
(Trinity College (Dublin, Ireland). Department of Geology, 2013)Southern Africa contains some of the oldest crust on Earth, with the Archean Kaapvaal Craton bordered to the North by the Archean-Paleoproterozoic Limpopo belt. To understand the mechanisms of deformation of the Archean ... -
Spectral Gamma Ray (SGR) Analysis of Sedimentary Environments in Early Continental Rift Basins: Implications for Petroleum Exploration
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)Continental rift basins are structures of global geoscientific significance, as they hold over 30% of the world?s giant oil fields and serve as modern day examples of unique biodiversity sites, typically operating as ... -
Stratigraphy and correlation of the Sarab Formation, Al Huqf Area, with the subsurface ara group play systems of Oman
(Trinity College (Dublin, Ireland). Department of Geology, 2010)This study identifies and defines for the first time the Sarab Formation, a new formation in the uppermost part of the Ediacaran - Cambrian Huqf Supergroup of the Sultanate of Oman. The potential importance of this new ... -
Structure and evolution of the upper mantle of the Australian Plate and North Atlantic Ocean from waveform tomography
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2023)With the expansion of regional and global seismic networks and the advancing of tomographic techniques, tomography models are able to reveal the heterogeneities in the Earth's interior with an increasing amount of detail. ... -
A study of alteration and mineralisation at the Mace Mo-Cu Porphyry deposit, Ireland
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)The Mace molybdenum-copper (Mo-Cu) deposit in the west of Ireland has been explored since the early 1960s, but remains poorly understood in terms of classic porphyry style systems. Knowledge of porphyry systems in general ... -
Tertiary dykes in northwest Ireland: field occurrence, emplacement mechanisms, host rock deformation, and post-emplacement strain and denudation
(Trinity College (Dublin, Ireland). Department of Geology, 2006)This work provides insight into the Tertiary tectonic and stress history of northwest Ireland. It focuses on igneous dykes, as these are the only rocks of Tertiary age in the region. The work also looks at the fundamental ... -
Testing the utility of an organic geochemical approach to Holocene sea-level change in the Shannon estuary
(Trinity College (Dublin, Ireland). Department of Geology, 2013)This project tests a recently developed, geochemically-based technique for relative sea- level (RSL) reconstruction to assess its applicability in the Shannon region. The technique is underpinned by the identification of ... -
The carboniferous geology of the Carrick-on-Suir syncline, Southern Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 1980)A geological map of the Carrick-on-Suir Syncline is presented at a scale of 1:31680 (2 inches to one mile). The thirteen mapping units proposed are discussed in detail; all but the lowermost are Carboniferous in age. The ... -
The genesis of exceptionally thick shallow marine sequences exposed within the South Munster Basin of southern Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2002)The South Munster Basin (southern Ireland) is an E-W trending fossil rift system that was active during the Late Devonian and Early Carboniferous. Subsidence during this period was rapid and led, despite a high sediment ... -
The geological evolution of the petroleum prospective Mandawa Basin southern coastal Tanzania
(Trinity College (Dublin, Ireland). Department of Geology, 2011) -
The geological evolution of the southern Tanzanian continential margin
(Trinity College (Dublin, Ireland). Department of Geology, 2013) -
The influence of fractures on topography and groundwater flow in the Burren and Gort lowlands, western Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2006)The primary hypothesis of this thesis is that "Topographic depressions are located along areas of high fracture density" and by association that topographic depressions will identify areas of high fracture density, A ...