Browsing Geology by Title
Now showing items 193-212 of 300
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Organic synthesis on Mars by electrochemical reduction of CO2
(American Association for the Advancement of Science, 2018)The sources and nature of organic carbon on Mars have been a subject of intense research. Steele et al. (2012) showed that 10 martian meteorites contain macromolecular carbon phases contained within pyroxene- and olivine-hosted ... -
Origin and evolution of the Mesoarchean Aouéouat greenstone belt and associated gold mineralisation
(Trinity College (Dublin, Ireland). Department of Geology, 2016)This Aouéouat greenstone belt is situated in the Tasiast-Tijirit Terrane of the Reguibat Shield, part of the West African Craton. Petrographic, geochronological, geochemical and isotopic studies of the Aouéouat greenstone ... -
Oxidative mafic rock weathering through geological time
(Trinity College (Dublin, Ireland). Department of Geology, 2015)Oxidative chemical weathering requires the presence of free oxygen in the Earth's atmosphere. Reconstructing the terrestrial oxidation history in the ancient rock record has helped to detect the intrinsic links between ... -
The Palaeo-Ecology and Geochemistry of Potential Source and Reservoir Microbialites in the Ediacaran-Cambrian Sirab Formation, Sultanate of Oman
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)Background Rationale & Aim; Ediacaran - Cambrian microbial carbonates are known to range from West Africa to Arabia and Pakistan. In the Sultanate of Oman, these microbialites serve as both source rock and reservoir in the ... -
Palynological correlation of Mississippian (Carboniferous) stages in Western Europe and the USA
(Trinity College (Dublin, Ireland). Department of Geology, 2009)Palynological assemblages from the Late Devonian - Mississippian of Kentucky and the Mississippi Valley have been studied. Productive samples have been obtained from two outcrops situated in northeast Kentucky and eight ... -
Palynostratigraphy and palynofacies analysis of upper Devonian and Mississippian strata of Eastern U.S.A.
(Trinity College (Dublin, Ireland). Department of Geology, 2009)Well preserved and taxonomically diverse miospore assemblages have been recovered from the uppermost Devonian and lower Mississippian strata of the Appalachian Basin, Eastern USA. Rock samples were collected from 13 ... -
Patterns and drivers of groundwater and stream nitrate concentrations in intensively managed agricultural catchments
(2022)The environmental loss of nitrogen in agricultural landscapes has pervasive consequences, including human health implications, eutrophication, loss of habitat biodiversity and greenhouse gas emissions. The efficacy of ... -
Peat bogs as archives of atmospheric metal pollution from natural and anthropogenic sources - A case study from Ireland
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)This research project combines various geochemical techniques to identify and characterise historic and recent sources of atmospheric metal pollution recorded in ombrotrophic peat bogs across Ireland. In a first subproject, ... -
Pesticide occurrence in Irish groundwater
(Trinity College (Dublin, Ireland). Department of Geology, 2012)Groundwater pesticide occurrence was investigated within agricultural catchments and at the national scale across Ireland. Seven intensive agricultural catchments were selected, each with different physical characteristics ... -
The petrography and geochemistry of pyrite-hosted orogenic gold deposits in the Grampian Terrane of north-west Ireland and Scotland
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)The Neoproterozoic-Cambrian Dalradian Supergroup of north-west Ireland and central Scotland accommodates vein-hosted gold deposits associated with uplift and deformation during the Ordovician Grampian arc-continent collision ... -
Petrological, mineralogical and geochemical peculiarities of Archaean cratons
(2019)The most outstanding features of Archaean cratons are their extraordinary thickness and enduring longevity. Seismically, Archaean cratonic fragments are sharply-bounded deep roots of mechanically strong, cold lithospheric ... -
Petrology and dating of the Permian lamprophyres from the Malá Fatra Mts. (Western Carpathians, Slovakia)
(2018)Calc-alkaline lamprophyres are known from several localities in the Malá Fatra Mountains. They form dykes (0.5-3 m) of varying degree of alteration that have intruded the surrounding granitoid rocks which are often ... -
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 ... -
Phosphorus exports from agricultural grassland in overland flow and subsurface drainage water
(Trinity College (Dublin, Ireland). Department of Geology, 2003)On the background of increasing phosphorus (P) concentrations in Irish rivers and lakes, this project set out to investigate several aspects of the potential of agricultural grassland to lose P to water. All study sites ... -
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 ... -
Physicochemical and Additive Controls on the Multistep Precipitation Pathway of Gypsum
(MDPI, 2017)Synchrotron-based small- and wide-angle X-ray scattering (SAXS/WAXS) was used to examine in situ the precipitation of gypsum (CaSO4·2H2O) from solution. We determined the role of (I) supersaturation, (II) temperature and ... -
Potential seasonal calibration for palaeoenvironmental reconstruction using skeletal microstructures and strontium measurements from the cold-water coral Lophelia pertusa
(2014)Lophelia pertusa is a colonial cold-water coral species with a wide spatial distribution in recent marine waters. Analysing the chemistry of its skeleton allows reconstruction of environmental parameter variations. While ...