Browsing Geology by Title
Now showing items 119-138 of 293
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A geo-thermochronological study offshore west of Ireland: the timing of exhumation and magmatic activity and the nature of the basement on the Irish Atlantic Margin
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)In recent years, the use of multiple low-temperature thermochronometers combined with inverse thermal history modelling of multiple samples on vertical profiles has been shown capable of detecting low magnitude exhumation ... -
Geochemical and mineralogical characterisation of the Caribou Zn-Pb VMS deposit, Bathurst Mining Camp, New Brunswick, Canada
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)The Caribou Volcanogenic Massive Sulphide (VMS) Zn-Pb deposit in the Appalachians of Eastern Canada is hosted by Middle Ordovician shale and felsic volcanic rocks and deposited in a back-arc environment. The entire mineralised ... -
Geochemical characterisation of the Late Quaternary widespread Japanese tephrostratigraphic markers and correlations to the Lake Suigetsu sedimentary archive (SG06 core)
(2019)Large Magnitude (6–8) Late Quaternary Japanese volcanic eruptions are responsible for widespread ash (tephra) dispersals providing key isochrons suitable for the synchronisation and dating of palaeoclimate archives across ... -
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 ... -
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 ... -
Geochemistry & Stratigraphy of the Mesozoic & Cenozoic Sedimentary Rocks Encountered in the Mandawa Basin, South Eastern Tanzania
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)The Mandawa Basin in south eastern Tanzania has long been regarded as the most hydrocarbon-prospective onshore sedimentary basin in the country. However, despite containing the ingredients necessary for a working petroleum ... -
Geochemistry of the Phlegraean Fields (Italy) proximal sources for major Mediterranean tephras: Implications for the dispersal of Plinian and co-ignimbritic components of explosive eruptions
(2012)Volcanic activity at Phlegraean Fields, Italy, produced several major marker tephras over a 50 ka period. The caldera forming eruptions of the Campanian Ignimbrite (CI) and Neapolitan Yellow Tuff (NYT) are of particular ... -
Geochronology and glass geochemistry of major pleistocene eruptions in the Main Ethiopian Rift: Towards a regional tephrostratigraphy
(2022)The Main Ethiopian Rift (MER) is renowned as a focus of investigations into human origins. It is also the site of many large volcanic calderas, whose eruptions have spanned the timeframe of speciation, cultural innovation, ... -
Geochronology of the Tardree Rhyolite Complex, Northern Ireland: Implications for zircon fission track studies, the North Atlantic Igneous Province and the age of the Fish Canyon sanidine standard
(2011)The British-Irish Palaeogene Igneous Province (BIPIP) is part of the larger North Atlantic Igneous Province and includes the lava fields of Antrim, Mull, and Skye. The Tardree Rhyolite Complex (TRC) in Northern Ireland ... -
Geology and stratigraphy of the south-eastern Lake Edward basin (Petroleum Exploration Area 4B), Albertine Rift Valley, Uganda
(2016)The Lake Edward basin lies within the Albertine Rift Valley of Uganda and the Democratic Republic of Congo which forms the northern end of the western arm of the East African Rift System. It is a frontier petroleum prospective ... -
Geophysical exploration for offshore evidence of relict shorelines on the northern coast of Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2014)The current generation of postglacial Relative Sea Level (RSL) change simulations in formerly glaciated margins display significant deviations from field evidence. This is particularly true in Ireland where the RSL history ... -
Groundwater nitrate reduction versus dissolved gas production: A tale of two catchments
(2017)At the catchment scale, a complex mosaic of environmental, hydrogeological and physicochemical characteristics combine to regulate the distribution of groundwater and stream nitrate (NO3−). The efficiency of NO3− removal ... -
The Halogen Composition of the Proto-Iceland Plume Source Mantle
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)The study of halogens in mantle-derived melts is allowing for new and unique insights into mantle geodynamics (e.g. Kendrick et al., 2017). The current dataset of mantle halogens record the compositions of both the depleted ... -
Heinrich Events and the British-Irish Ice Sheet: evidences of palaeoceanographic changes in the Rockall Trough
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2023)The Porcupine Bank is an offshore plateau connected to the Irish Shelf west of Ireland. Its western flank is affected by several water masses associated with the Atlantic Meridional Overturning Circulation (AMOC) and other ... -
Hidden Archaean and Palaeoproterozoic crust in NW Ireland? Evidence from zircon Hf isotopic data from granitoid intrusions
(2009)The presence of major crystalline basement provinces at depth in NW Ireland is inferred from in situ Hf isotope analysis of zircons from granitoid rocks that cut structurally overlying metasedimentary rocks. Granitoids in ... -
High-precision U-Pb dating of complex zircon from the Lewisian Gneiss Complex of Scotland using an incremental CA-ID-TIMS approach
(2015)A novel approach of thermally annealing and sequentially partially dissolving single zircon grains prior to high-precision Isotope Dilution Thermal Ionization Mass Spectrometry (ID-TIMS) is presented. This technique is ...
