Geology: Recent submissions
Now showing items 201-220 of 315
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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. -
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 ... -
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 ... -
Acoustic imaging of variable water layer structure in Rockall Trough, NE Atlantic
(Trinity College (Dublin, Ireland). Department of Geology, 2012)A new application of an old technique to study the Earth’s interior is allowing us to see stratification in the ocean, providing a new insight into oceanic structure and mixing processes. The new adaptation of seismic ... -
Phosphorus dynamics in some Irish soils : the influence of laboratory drying, soil characteristics and season
(Trinity College (Dublin, Ireland). Department of Geology, 2005)Phosphorus (P) is a nutrient that is important in hmiting biological growth in fresh waters, and desorption of P from soils is thought to be an important driver for the eutrophication of freshwater bodies. Previous studies ... -
A multi-radioisotope approach to dating sedimentation : applying Re-Os organic-rich shale and U-Pb authigenic xenotime dating to the Shannon and Pennine Basins
(Trinity College (Dublin, Ireland). Department of Geology, 2013)Sedimentary rocks are the most abundant hthologies on the Earth, covering over 70% of the planet’s surface. Quantitative dating of sedimentary rocks (especially those devoid of fossils) is critical to understanding the ... -
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 ... -
The structural evolution and giant landslides of La Palma, Canary Islands
(Trinity College (Dublin, Ireland). Department of Geology, 2005)The island of La Palma, in the western Canary Archipelago, is formed by a partially dismantled and eroded Plio-Pleistocene strato-shield volcano (Taburiente/Cumbre Nueva) that is overlapped and elongated to the south by ... -
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 ...
