Browsing Geology by Title
Now showing items 214-233 of 293
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Radon Potential as a diagnostic tool for indoor radon hazard mapping
(2019)At over 56% of the annual effective dose, radon is the primary source of ionizing radiation exposure received by the Irish population. Although the average indoor radon concentration in Ireland has been reduced since ... -
Rapid radon potential classification using soil-gas radon measurements in the Cooley Peninsula, County Louth, Ireland
(2019)A rapid method for local-scale radon risk assessment using in situ radon soil-gas measurements and a national-scale soil permeability data set have been evaluated. We test and validate our approach in a case study on the ... -
Rare Earth Element Determination in Olivine by Laser Ablation-Quadrupole-ICP-MS: An Analytical Strategy and Applications
(2017)Olivine offers huge, largely untapped, potential for improving our understanding of magmatic and metasomatic processes. In particular, a wealth of information is contained in rare earth element (REE) mass fractions, which ... -
Rare earth elements in olivine:determination, occurrence and behaviour
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2018)Olivine is a widely occurring mineral that offers great potential for improving our understanding of geological processes. Olivine is present across a range of geologically significant settings, occurring in stony-iron ... -
Re-Os geochronology of the Neoproterozoic - Cambrian Dalradian Supergroup of Scotland and Ireland: Implications for Neoproterozoic stratigraphy, glaciations and Re-Os systematics
(2011)New Re-Os geochronology for the Ballachulish Slate Formation of the Dalradian Supergroup, Scotland yields a depositional age of 659.6 ? 9.6 Ma. This age represents the first successful application of the Re-Os system to ... -
Reaction pathways and textural aspects of the replacement of anhydrite by calcite at 25 °C
(2017)The replacement of sulfate minerals by calcium carbonate polymorphs (carbonation) has important implications in various geological processes occurring in Earth surface environments. In this paper we report the results of ... -
Reaction Pathways toward the Formation of Bastnäsite: Replacement of Calcite by Rare Earth Carbonates
(2021)The interaction of rare earth bearing (La, Nd, Dy) aqueous solutions with calcite crystals at ambient and hydrothermal conditions (25–220 °C) results in the solvent-mediated surface precipitation and subsequent pseudomorphic ... -
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 ... -
Refinement of high-spatial resolution U-Pb geochronological methodologies
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2021)Zircon [ZrSiO4] is a naturally occurring mineral commonly used in geochronological, isotope and elemental geochemical studies. It can form as an accessory phase in a wide variety of magmatic and metamorphic conditions and ... -
Regional-scale structure and dynamics of the crust, upper mantle and transition zone from waveform tomography with massive datasets
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)In the last decade, the number of seismic stations deployed globally increased dramatically, allowing to construct tomographic models with increasing resolution. Seismic data coverage however, is not homogeneous across the ... -
Revisiting the Y-3 tephrostratigraphic marker: a new diagnostic glass geochemistry, age estimate, and details on its climatostratigraphical context
(2015)The ‘Y-3’ tephra is a crucial stratigraphic marker within the central Mediterranean region that falls close to the Marine Isotope Stage 3/2 transition and a cooling event proposed as a correlative of the North Atlantic ... -
Rift flank uplift at the Gulf of California: No requirement for asthenospheric upwelling
(2014)Continental rifts are commonly flanked by zones of high elevation, but the cause of uplift remains controversial. Proposed uplift mechanisms include active and induced asthenospheric upwelling, and isostatically driven ... -
The role of amorphous precursors in the crystallization of La and Nd carbonates
(2015)Crystalline La and Nd carbonates can be formed from poorly-ordered nanoparticulate precursors, termed amorphous lanthanum carbonate (ALC) and amorphous neodymium carbonate (ANC). When reacted in air or in aqueous solutions ... -
The role of REE3+ in the crystallization of lanthanites
(2014)The formation of crystalline rare earth element (REE) (e.g. La, Ce, Pr, Nd) carbonates from aqueous solutions was examined at ambient temperature using UV-Vis spectrophotometry, combined with X-ray diffraction, high-resolution ... -
A route for the direct crystallization of dolomite
(2015)The direct crystallization of dolomite from an aqueous solution at temperatures between 60–220 °C was followed in situ through time-resolved synchrotron-based energy-dispersive X-ray diffraction combined with offline ... -
Salinity-Dependent Adhesion Response Properties of Aluminosilicate (K-Feldspar) Surfaces
(2017)Flooding sandstone oil reservoirs with low salinity water can lead to a significant increase in oil recovery, a phenomenon called “the low salinity effect”. Although there are many factors that contribute to this response, ... -
Sedimentology analysis and correlation of the Mullaghmore sandstone formation in the north and north-west of Ireland
(Trinity College (Dublin, Ireland). Department of Geology, 2003)The aims of this study were to provide a sedimentological analysis and environmental interpretation for the Mullaghmore Sandstone Formation and its equivalents, extending from south Donegal to south Sligo and into the north ... -
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 ...