Geology (Theses and Dissertations): Recent submissions
Now showing items 41-60 of 130
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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 ... -
Deciphering geochemical signals across a Cambro-Ordovician carbonate platform
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)Sulfur isotopes (δ34S) preserve a geological record of seawater sulfate that permit insights into biogeochemical cycling, surface redox conditions and microbial activity over geological time. However, isotopic records from ... -
The trace element and U-Pb systematics of metamorphic apatite and its application in provenance studies
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)Apatite is a common accessory mineral in igneous, sedimentary and metamorphic rocks. It has potential as a provenance indicator in clastic sedimentary systems, as it can host a wide variety of trace elements in its crystal ... -
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 ... -
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 ... -
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 ... -
Broadband Surface Wave Tomography of Ireland, Britain and Other Regions
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)Over the last decades, seismic surface-wave studies have produced increasingly detailed images of the Earth s structure at a regional scale. In this study, we have tuned well-established techniques and when required ... -
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 ... -
Pesticide occurrence in Irish groundwater
(Trinity College (Dublin, Ireland). Department of Geology, 2012)Groundwater pesticide occurrence was investigated within agricultural catchments and at the national scale across Ireland. Seven intensive agricultural catchments were selected, each with different physical characteristics ... -
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 ... -
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 ... -
Fingerprinting isotopic signatures for metal enrichment in European trees: Developing vectors for mineral exploration
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)The trace-element geochemistry of native and common plant species in Ireland including ash, beech, blackberry, hawthorn, oak, poplar and sycamore was systematically determined above the Navan Zn-Pb deposit, currently mined ... -
Furthering the potential of apatite as a provenance indicator in sedimentary systems
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)As a mineral that has only recently become possible to date routinely by the U-Pb method, apatite geochemistry (U-Pb isotopes and trace elements) has until now attracted less attention than longer-established detrital ... -
Determination of Percentage Total Sulphur in Pyritic Building Aggregate using Inductively Coupled Plasma-Optical Emission Spectrometry, X-Ray Fluorescence and X-Ray Diffraction
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)Pyritic heave in subfloor aggregates is caused by the oxidation of pyrite, which produces sulphuric acid that reacts with calcite to form gypsum. The construction materials standard (I.S. 398-1:2013) specifies analyses of ... -
Palynostratigraphy and palynofacies analysis of upper Devonian and Mississippian strata of Eastern U.S.A.
(Trinity College (Dublin, Ireland). Department of Geology, 2009)Well preserved and taxonomically diverse miospore assemblages have been recovered from the uppermost Devonian and lower Mississippian strata of the Appalachian Basin, Eastern USA. Rock samples were collected from 13 ... -
Cenozoic flexural uplift in northwestern Ireland and sedimentation in the northeastern Irish Rockall Basin
(Trinity College (Dublin, Ireland). Department of Geology, 2002)This study brings together for the first time in northwestern Ireland the onshore and offshore evolution of a passive margin during North Atlantic rifting and tries to contribute to a better understanding of the relationship ... -
Elemental and isotope fingerprint of metal deficiency in soils
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)Metal deficiency in soils is a frequently observed phenomenon in (sub)-tropical regions, and both natural and anthropogenic processes contribute to the depletion of soil reservoirs. Advanced chemical weathering, in old ... -
Peat bogs as archives of atmospheric metal pollution from natural and anthropogenic sources - A case study from Ireland
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)This research project combines various geochemical techniques to identify and characterise historic and recent sources of atmospheric metal pollution recorded in ombrotrophic peat bogs across Ireland. In a first subproject, ... -
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 ... -
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. ...
