Geology (Theses and Dissertations): Recent submissions
Now showing items 81-100 of 130
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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 ... -
A multi-proxy palaeoceanographic investigation of slope deposits on Porcupine Bank, NE Atlantic Ocean
(Trinity College (Dublin, Ireland). Department of Geology, 2010)High resolution imaging of the continental slope west of the Porcupine Bank by the Irish National Seabed Survey reveals an area that is smooth and relatively undisturbed. The area lacks evidence of debris flows and canyon ... -
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 ... -
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. ... -
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 ... -
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 ... -
An investigation of the fluids involved in the formation of some Irish lower carboniferous dolomites
(Trinity College (Dublin, Ireland). Department of Geology, 2004)Irish Carboniferous rocks are host to an abnormally large amount of lead/zinc mineralisation and are internationally important in studies of the genesis of carbonate- hosted lead/zinc deposits. The host to mineralisation ... -
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 ... -
The sedimentology and stratigraphy of the Early Triassic Sherwood Sandstone Group in the East Irish Sea and Cheshire Basins of NW England
(Trinity College (Dublin, Ireland). Department of Geology, 2004)The existing stratigraphic nomenclature applied to the Early Triassic Sherwood Sandstone Group in NW England has resulted from more than 150 years of geological investigation but is characterised by a stratigraphic system ... -
Processes of magmatic differentiation within the southern British and Irish Palaeogene Igneous Province
(Trinity College (Dublin, Ireland). Department of Geology, 2009)This thesis presents a geochemical study of magma - crust interaction within the volcanic centres of the southern British and Irish Palaeogene Igneous Province. Three centres occur in northeast Ireland; the Carlingford ... -
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 ... -
Aspects of the palaeoecology and palaeoenvironmental setting of Waulsortian carbonate buildups in Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2000)The aim of this project has been to elucidate further aspects of the palaeoecology and palaeoenvironmental setting of the Waulsortian facies which developed in Ireland during the late Dinantian. Various techniques have ... -
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 ... -
Phosphorus in Irish aquifers : implications for input to surface waters
(Trinity College (Dublin, Ireland). Department of Geology, 2002)This project examines phosphorus levels in a range of Irish hydrogeological situations, both to fill this gap in basic scientific knowledge, and to determine the circumstances in which concentrations likely to trigger ... -
Aspects of landscape evolution, lineaments and fault zone mineralisation in southeast Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2008)The findings of this work are presented in 8 chapters. Chapter 2 deals with a deep weathering profile in limestone at the Timahoe, County Kildare. Detailed analysis of materials collected from an investigatory borehole ... -
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 ... -
The structure of Guadeloupe, Maderas and Mt Cameroon volcanoes and the impact of strike-slip movements
(Trinity College (Dublin, Ireland). Department of Geology, 2010)There are three kinds of strike-slip faults: pure strike-slip, transtensional and transpressional. They have been recognized in all geodynamic environments and are the most common fault type associated with volcanic activity. ... -
The use of dissociated crinoid ossicles as biostratigraphical and palaeoecological tools in the Carboniferous of northwest Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2001)Fossil crinoids were investigated from the Lower Carboniferous (Visean) rocks of northwest Ireland. In this area the deltaic Mullaghmore Sandstone Formation stratigraphically separates the Bundoran Shale Formation (Arundian) ... -
Provenance and flux of late quaternary sediment, Southeast Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2002)The major sediment routing systems of Southeastern Ireland in the vicinity of the Leinster Massif were examined and quantified. Samples were taken from four of the major river systems, the Avoca, Barrow, Liffey and Slaney ... -
The provenance of the Mississipian Ballyvergin Shale an integrated palynological and lithostratigraphic investigation
(Trinity College (Dublin, Ireland). Department of Geology, 2004)The Ballyvergin Shale Formation (BSF) is a unique and enigmatic formation within the Irish Toumaisian lithostratigraphy. While a definite provenance for the formation has not been identified speculation of a north, north-west ...
