Browsing Geology (Theses and Dissertations) by Title
Now showing items 21-40 of 119
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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 ... -
Characterising dispersed metal plumes in surficial soils and sediments in the Irish Midlands: Using isotope fingerprints to develop vectors in mineral exploration
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)The enhancement of mineral exploration is essential for the growing demand of base metals in the world. Successful geochemical surveys in soil and till have led to numerous discoveries. However, most of these deposits are ... -
Chemostratigraphic Investigation of Early Carboniferous Tuffs and Limestones from the Irish Midlands Based on Geochemical and Geochronological Fingerprinting
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)The timing of mineralisation of the Irish Zn-Pb ore field is currently poorly understood. It can be improved by more accurate stratigraphic correlations of the Carboniferous (Mississippian Subsystem) host rocks (Heckel ... -
Cobalt of the Tyrone Igneous Complex: geochemistry of mafic hosted sulphides and remobilisation
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2023)Primary sulphide mineralisation in mafic rocks and secondary remobilised sulphides contain significant cobalt and relate to early Palaeozoic ocean closure and arc-continent collision in the Irish Caledonian terrane. This ... -
Consequences of giant landslides on ocean island magmatism: volcanic and geochemical evolution of the Teno massif, Tenerife, and El Hierro Island (Canary Archipelago)
(Trinity College (Dublin, Ireland). Department of Geology, 2009) -
Constraints on the thermal conditions within the cratonic lithospheric mantle through time
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)The stabilization of Earth s first continents is inescapably linked to the formation of the ancient cratonic lithospheric mantle. The cratonic lithospheric mantle is widely considered to have formed as a residue of extreme ... -
Constructing global carboniferous climatic fluctuations using high resolution geochronology
(Trinity College (Dublin, Ireland). Department of Geology, 2012)The Carboniferous Period was a time of substantial climatic change, during which occurred the transition from a greenhouse (ice-free) environment into major continental glaciation. The onset of major Carboniferous glaciation ... -
Crustal processes in volcanic systems : case studies from Northern Ireland, New Zealand, and Indonesia
(Trinity College (Dublin, Ireland). Department of Geology, 2008)It is evident that modification of primary melts from the mantle is significant in magma petrogenesis as primitive magmas are only rarely observed as erupted lavas at the Earth’s surface. Ascent and density filtering of ... -
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 ... -
Deformation band fault core : character, evolution and influence on bulk fluid flow
(Trinity College (Dublin, Ireland). Department of Geology, 2006)Deformation band fault core has only recently been recognised as a distinct component of deformation band faults. Previously, deformation bands were divided into single deformation bands, zones of deformation bands and ... -
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 ... -
Determining the depths and timescales of pre-eruptive processes before the historical 1538 Monte Nuovo eruption (Campi Flegrei caldera, Italy)
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)Campi Flegrei, Italy is one of the most populated caldera volcanoes on Earth and a detailed understanding of its sub-volcanic magma system and pre-eruptive processes are essential for effective hazard mitigation. Of ... -
Development of a SEM-EDS method for quantifying free mica in building materials
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)The publication of Irish Standard IS 465:2018 highlighted the need for a technique to accurately and non-subjectively quantify free mica. The standard was developed to assist those who intend to provide assessment and ... -
The Distribution of Precious and Energy-Critical Elements at the Scale of a Porphyry Copper Deposit
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)Magmatic-hydrothermal porphyry copper deposits are the world's primary sources of Cu. Moreover, these may contain extractable concentrations of rare metal(loid)s e.g., Se, Te, In, Co, Ge, Ga, Ag, Au and Re. Some of these ... -
Dynamic topography of Central and Southern Africa
(Trinity College (Dublin, Ireland). Department of Geology, 2009)Africa’s basin and swell topography is thought to be dynamically supported by mantle convection because it correlates closely with long wavelength free-air gravity anomalies, which can be regarded as a proxy for the ... -
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 ... -
Estimating exhumation from seismic stacking velocity data : a case study from the Slyne Basin, offshore NW Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2012)Exhumation describes the vertical upward displacement of rocks due to the removal of overburden material. In this study, seismic velocity profiles from 2D and 3D seismic reflection datasets have been inverted to constrain ... -
Evaluation of measures to reduce nitrate loss to groundwater from tillage land
(Trinity College (Dublin, Ireland). Department of Geology, 2011)Note: The author is preparing an academic paper using material from this thesis, therefore some sections and figures have been deliberately omitted. -
Evaluation of stable isotope analysis as a tool to determine nitrate sources in Irish groundwaters
(Trinity College (Dublin, Ireland). Department of Geology, 2007)This project, which explores combined and δ15N and δ18O analyses on soil-water and groundwater nitrate in conjunction with conventional chemical analysis of water constituents, primarily aims to give a critical evaluation ... -
Evolution and crustal contamination of igneous rocks from the Palaeocene volcanic district of North-West Scotland
(Trinity College (Dublin, Ireland). Department of Geology, 2009)This study was undertaken using a multidisciplinary approach employing detailed field mapping and geochemical sampling of rocks from the Isle of Rum, Ardnamurchan, Isle of Mull and the Isle of Eigg in North West Scotland. ...