Browsing Geology (Theses and Dissertations) by Title
Now showing items 48-67 of 119
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A geo-thermochronological study offshore west of Ireland: the timing of exhumation and magmatic activity and the nature of the basement on the Irish Atlantic Margin
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)In recent years, the use of multiple low-temperature thermochronometers combined with inverse thermal history modelling of multiple samples on vertical profiles has been shown capable of detecting low magnitude exhumation ... -
Geochemical and mineralogical characterisation of the Caribou Zn-Pb VMS deposit, Bathurst Mining Camp, New Brunswick, Canada
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)The Caribou Volcanogenic Massive Sulphide (VMS) Zn-Pb deposit in the Appalachians of Eastern Canada is hosted by Middle Ordovician shale and felsic volcanic rocks and deposited in a back-arc environment. The entire mineralised ... -
Geochemical origins of trvertines limestones in the Edward Basin, Albertine Riff DRC - Uganda
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)From 2007 to 2014, geological field surveys have been undertaken within the East African Rift System where hot spring Travertine and limestones have been discovered, precipitated at active, or palaeo-spring sites around ... -
Geochemical signature of rift relocations at Iceland
(Trinity College (Dublin, Ireland). Department of Geology, 2010)Iceland is located at the intersection between the Mid-Atlantic Ridge and a mantle plume. Three active rift segments at Iceland represent the onshore expression of the Mid-Atlantic Ridge. Iceland’s tectonic evolution has ... -
Geochemistry & Stratigraphy of the Mesozoic & Cenozoic Sedimentary Rocks Encountered in the Mandawa Basin, South Eastern Tanzania
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)The Mandawa Basin in south eastern Tanzania has long been regarded as the most hydrocarbon-prospective onshore sedimentary basin in the country. However, despite containing the ingredients necessary for a working petroleum ... -
Geophysical exploration for offshore evidence of relict shorelines on the northern coast of Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2014)The current generation of postglacial Relative Sea Level (RSL) change simulations in formerly glaciated margins display significant deviations from field evidence. This is particularly true in Ireland where the RSL history ... -
The Halogen Composition of the Proto-Iceland Plume Source Mantle
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)The study of halogens in mantle-derived melts is allowing for new and unique insights into mantle geodynamics (e.g. Kendrick et al., 2017). The current dataset of mantle halogens record the compositions of both the depleted ... -
Heinrich Events and the British-Irish Ice Sheet: evidences of palaeoceanographic changes in the Rockall Trough
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2023)The Porcupine Bank is an offshore plateau connected to the Irish Shelf west of Ireland. Its western flank is affected by several water masses associated with the Atlantic Meridional Overturning Circulation (AMOC) and other ... -
Insight into the origins of metasomatism along the southern margin of the North Atlantic Craton, South Greenland
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)The cratonic sub-continental lithospheric mantle (C-SCLM) has been isolated from mantle convection since it stabilised more than 2.5 billion years ago. Volatiles introduced into the C-SCLM drive metasomatism, ultramafic ... -
An Integrated Multi-Isotope and Element Distribution Study of the Irish Biosphere
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2017)Geochemical variation in major and trace element concentrations and multiple isotope systems (87Sr/86Sr, δ18O, δ2H, δ13C, δ15N) are explored within the Irish biosphere. This is done through the analysis of an array of ... -
Integrated simulation for improved mineral recovery processes
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)The consumption of mineral and metals is increasing as the population grows and the demand for mineral resources will remain high and evolve as society moves towards a carbon-neutral future. The increasing demand for metals, ... -
Interaction of Ca-Mg Carbonates with Rare Earth Element bearing Fluids under Ambient and Hydrothermal Conditions
This thesis aims to investigate the mechanisms of formation of hydroxylbastnäsite, a significant source of rare earth elements, in order to uncover the fundamental principles governing its crystallisation. The precise ... -
Investigating veterinary antiparasitic drugs as emerging contaminants in Irish groundwater
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)Due to increased intensification of the food production system, veterinary drugs have become a critical component in animal husbandry in Ireland and more broadly within the European Union. The administration of such ... -
An investigation into the Bryozoa of Ireland including the distributional patterns of the marine Bryozoa of Ireland over the last 150 years
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)Bryozoans are sessile filter feeding marine invertebrates. Research in Ireland on bryozoans has been sparse in recent years but many studies were carried out in the early 1900's by researchers such as Albert Russell Nichols ... -
Investigation of the stratigrphy, maturation and source-rock potential of Carboniferous black shales in the Dublin Basin
(Trinity College (Dublin, Ireland). Department of Geology, 2000)The Viséan part of the Dublin Basin stratigraphic succession is dominated turbiditic calcarenites interbedded with grey/black shales. Sedimentological analysis of four exploration wells drilled in the north part of the ... -
Irish sills of the North Atlantic Igneous Province : seismic imaging observations and implications for climate change
(Trinity College (Dublin, Ireland). Department of Geology, 2011) -
Iron oxide and associated base metal mineralisation in the Central Midlands Basin, Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2000)This study describes and characterises the iron oxide mineralisation (hematite, magnetite, silica) associated with base metal mineralisation in the Irish Central Midlands Basin. The iron oxide mineralisation occurs over a ... -
Jurassic evaporites and diapirism along the southern Tanzanian continental margin: Implications for petroleum exploration
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)One of the key issues for petroleum exploration along the entire Tanzanian margin is the extent of evaporite deposition and its diapirism. This leads to scenarios for the configuration and relative movement of conjugate ... -
Landscape evolution at a young rifted margin: the Loreto region of Baja California Sur, Mexico.
(Imperial College London, Imperial College London, 2012)Continental rifts are commonly flanked by zones of high elevation. Proposed uplift mechanisms include active and induced asthenospheric upwelling, and isostatically driven lithospheric flexure. Although these hypotheses ... -
Magmatic differentiation and bimodality in oceanic island settings - implications for the petrogenesis of magma in Tenerife, Spain
(Trinity College (Dublin, Ireland). Department of Geology, 2010)The Tenerife post-Icod-collapse succession, comprised of the Teide-Pico Viejo central complex and its adjacent rift zones, marks the latest eruptive cycle on Tenerife (200-0 ka) that broadly evolved from primitive lavas ...