Browsing Geology (Theses and Dissertations) by Title
Now showing items 58-77 of 121
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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 ... -
Mesozoic-Tertiary tectonics of SE Ireland and genetic link to offshore extensional basins
(Trinity College (Dublin, Ireland). Department of Geology, 2001)This work shows that Mesozoic-Tertiary tectonics in Central-East and SE Ireland is more significant than previously recognised. A review of the existing geological and geophysical literature and structural mapping around ... -
Mid to Upper Viséan facies and palaeoenvironments of the Shannon Basin, Western Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2010)The Shannon Basin, located in southwest Ireland, was a long-lived structure, with sediments accumulating there from earliest Tournaisian to late Bashkirian times (Carboniferous: Mississippian-Pennsylvanian). The basin is ... -
Nitrogen and carbon isotopes in fossil aquatic ecosystems
(Trinity College (Dublin, Ireland). Department of Geology, 2009)In a modem ecosystem, the trophic level of organisms can be distinguished on the basis of their nitrogen and organic carbon isotopic signature (DeNiro & Epstein 1978 and 1981). Due to fractionation during the assimilation ... -
Nitrogen Attenuation along Delivery Pathways in Agricultural Catchments
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)Anthropogenic application of inorganic and organic nitrogen (N) to agricultural landscapes has pervasive consequences, including human health implications, eutrophication, loss of habitat biodiversity and greenhouse gas ... -
Nitrogen isotopes in the palynomorph Tasmanites, as an indicator of climate change
(Trinity College (Dublin, Ireland). Department of Geology, 2014)The stable nitrogen isotope signature (δ15N) of plants and animals preserved in sedimentary rocks retain a record of past oceanic and atmospheric chemical changes. The majority of modem nitrogen isotope studies focus ... -
Novel geochemical fingerprints of biogenicity applied to ancient carbonates
(Trinity College (Dublin, Ireland). Department of Geology, 2016)The oxygenation of the Earth’s surface shaped our planetary environment, fundamentally altered global biogeochemical cycles, and ultimately paved the way for the rise of complex animals at the beginning of the Cambrian. ... -
Origin and evolution of the Mesoarchean Aouéouat greenstone belt and associated gold mineralisation
(Trinity College (Dublin, Ireland). Department of Geology, 2016)This Aouéouat greenstone belt is situated in the Tasiast-Tijirit Terrane of the Reguibat Shield, part of the West African Craton. Petrographic, geochronological, geochemical and isotopic studies of the Aouéouat greenstone ... -
Oxidative mafic rock weathering through geological time
(Trinity College (Dublin, Ireland). Department of Geology, 2015)Oxidative chemical weathering requires the presence of free oxygen in the Earth's atmosphere. Reconstructing the terrestrial oxidation history in the ancient rock record has helped to detect the intrinsic links between ...