Browsing Geology by Title
Now showing items 1-20 of 293
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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 ... -
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 ... -
A study of some Irish Lower Carboniferous fish microvertebrates
(Trinity College (Dublin, Ireland). Department of Geology, 2000)Fish microvertebrates (often referred to as ichthyoliths) are a common, but largely unrecorded, component of the faunas of the Irish Lower Carboniferous. Material from four study areas within the Dinantian (Carboniferous) ... -
A study of the effects of thin dyke intrusions on mudrock
(Trinity College (Dublin, Ireland). Department of Geology, 2003)The aim of this work is to examine the thermal response of mudrock to the short lived heating event induced by dyke intrusion. The work examines five Carboniferous mudrock horizons, intruded by Tertiary olivine tholeiitic ... -
ACC and vaterite as metastable intermediates in the solution based crystallization of CaCO3
(Springer International Publishing, 2017)Amorphous calcium carbonate (ACC) and vaterite are not very common in abiotic systems, but they play a very significant role in biomineralization processes and are key in the global carbon cycle. Despite their importance, ... -
Acid Treatment effects on the stable isotopic signature of fossils
(2012)Prior to geochemical analyses, fossil bones and teeth are often extracted from any surrounding lithified sediments using chemical techniques such as immersion in acid. As stable isotope analysis becomes more commonplace ... -
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 ... -
Acritarch and prasinophyte colours as thermal maturity indicators
(Trinity College (Dublin, Ireland). Department of Geology, 2006)Measurement of changes in the reflectivity of vitrinite (fossil woody material) in incident light is the standard technique for assessing the organic maturity of sedimentary rocks. However, vitrinite grains are rare or ... -
Age of the oldest known Homo sapiens from eastern Africa
(2022)Efforts to date the oldest modern human fossils in eastern Africa, from Omo-Kibish and Herto in Ethiopia, have drawn on a variety of chronometric evidence, including 40Ar/39Ar ages of stratigraphically associated tuffs. ... -
The Akcal Epithermal Deposit: An Example of Low-Sulfidation Gold Mineralization in Western Turkey
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2023)The Akcal epithermal Au-Ag deposit is located on the Biga Peninsula, southwestern Turkey and is estimated to contain 32.5 million tonnes of mineralization at an average grade of 1.03 g/t Au, equivalent to 33.5 tonnes of ... -
Ammonoid biostratigraphy of the Shannon Basin, western Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2016)This study concerns ammonoid faunas from a classic turbidite succession, the Ross Sandstone Formation [Serpukhovian-Bashkirian) of the Shannon Basin, western Ireland. In addition to coastal exposures, a set of 12 behind-outcrop ... -
Amorphous dysprosium carbonate: characterization, stability, and crystallization pathways
(2013)The crystallization of amorphous dysprosium carbonate (ADC) has been studied in air (21–750 °C) and in solution (21–250 °C). This poorly ordered precursor, Dy2(CO3)3·4H2O, was synthesized in solution at ambient temperature. ... -
An experimental study of the geometry and kinematics of caldera collapse
(Trinity College (Dublin, Ireland). Department of Geology, 2008)Calderas are 1 - 100 km diameter, volcanic depressions that form primarily through m-scale to km–scale subsidence of a magma reservoir roof into an underlying magma reservoir. This study addresses several fundamental ... -
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 ... -
An investigation of the palynology, stratigraphy and palaeogeography of carboniferous rocks in western Irish offshore basins
(Trinity College (Dublin, Ireland). Department of Geology, 2012)