Geology: Recent submissions
Now showing items 41-60 of 315
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Multiple fluorescence approaches to identify rapid changes in microbial indicators at karst springs
(2023)Karst springs are globally important for drinking water supply but are often also exceptionally vulnerable to contamination. Such springs usually exhibit strong variation in microbial water quality in sharp response to ... -
Metasomatism of the Kaapvaal Craton during Cretaceous intraplate magmatism revealed by combined zircon U-Pb isotope and trace element analysis
(2021)The origins of the mica-amphibole(K-richterite)-rutile-ilmenite-diopside (MARID) and the, presumably related, phlogopite-K-richterite-peridotite (PKP) mantle xenolith suites remain enigmatic. For instance, it is unclear ... -
Depth-dependent peridotite-melt interaction and the origin of variable silica in the cratonic mantle
(2021)Peridotites from the thick roots of Archaean cratons are known for their compositional diversity, whose origin remains debated. We report thermodynamic modelling results for reactions between peridotite and ascending mantle ... -
A Thermodynamic Model for the Subsolidus Evolution and Melting of Peridotite
(2021)We present a structural update to the thermodynamic model for calculating peridotite phase relations and melt compositions at 0·01 to 60 kbar and from 600 °C to the peridotite liquidus in the system K2O–Na2O–CaO–FeO–MgO– ... -
Lake Ohrid?s tephrochronological dataset reveals 1.36?Ma of Mediterranean explosive volcanic activity
(2021)Tephrochronology relies on the availability of the stratigraphical, geochemical and geochronological datasets of volcanic deposits, three preconditions which are both often only fragmentary accessible. This study presents ... -
Community established best practice recommendations for tephra studies?from collection through analysis
(2022)Tephra is a unique volcanic product with an unparalleled role in understanding past eruptions, long-term behavior of volcanoes, and the effects of volcanism on climate and the environment. Tephra deposits also provide ... -
No evidence for tephra in Greenland from the historic eruption of Vesuvius in 79?CE: implications for geochronology and paleoclimatology
(2022)Volcanic fallout in polar ice sheets provides important opportunities to date and correlate ice-core records as well as to investigate the environmental impacts of eruptions. Only the geochemical characterization of volcanic ... -
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, ... -
Eruption frequency and magnitude in a geothermally active continental rift: The Bora-Baricha-Tullu Moye volcanic complex, Main Ethiopian Rift
(2022)Many Quaternary silicic volcanoes in the Main Ethiopian Rift pose a potential risk due to the poorly known eruptive histories of the volcanoes in combination with a high population density. In this study we provide new ... -
Evidence for a very thick Kaapvaal craton root: Implications for equilibrium fossil geotherms in the early continental lithosphere
(2022)The presence of diamonds of Archaean age within the cratonic lithosphere is surprising because their formation implies a cool early mantle lithosphere despite the early Earth's hotter state. There remains a widely (albeit ... -
Using geogenic radon potential to assess radon priority area designation, a case study around Castleisland, Co. Kerry, Ireland
(2022)Globally, indoor radon exposure is the leading cause of lung cancer in non-smokers and second most common cause after tobacco smoking. Soil-gas radon is the main contributor to indoor radon, but its spatial distribution ... -
A Multi-proxy Provenance Study of Late Carboniferous to Middle Jurassic Sandstones in the Eastern Sverdrup Basin and Its Bearing on Arctic Palaeogeographic Reconstructions
(2023)A multi-proxy provenance study of Late Carboniferous to Middle Jurassic sandstones from the eastern Sverdrup Basin was undertaken employing optical petrography and heavy mineral analysis, chemical analysis of apatite, ... -
Detailed Geogenic Radon Potential Mapping Using Geospatial Analysis of Multiple Geo-Variables: A Case Study from a High-Risk Area in SE Ireland
(2022)A detailed investigation of geogenic radon potential (GRP) was carried out near Graiguenamanagh town (County Kilkenny, Ireland) by performing a spatial regression analysis on radon-related variables to evaluate the exposure ... -
Connemara Marble, Galway, Ireland: a Global Heritage Stone Resource proposal
(2020)Connemara Marble, a well-known distinctive decorative stone from the west of Ireland, is herein proposed as a Global Heritage Stone Resource. Connemara Marble is a sillimanite-grade ophicarbonate, dominated by dolomite and ... -
Determining the depths and timescales of pre-eruptive processes before the historical 1538 Monte Nuovo eruption (Campi Flegrei caldera, Italy)
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)Campi Flegrei, Italy is one of the most populated caldera volcanoes on Earth and a detailed understanding of its sub-volcanic magma system and pre-eruptive processes are essential for effective hazard mitigation. Of ... -
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 ... -
Exploitation of Decorative Stone in Victorian Ireland: From Quarry to Building
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)Ireland contains a diverse range of rock types that are characterised as igneous, sedimentary or metamorphic in origin, which have been widely utilised for building, and to a lesser extent decorative, purposes over the ... -
Spectral Gamma Ray (SGR) Analysis of Sedimentary Environments in Early Continental Rift Basins: Implications for Petroleum Exploration
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2022)Continental rift basins are structures of global geoscientific significance, as they hold over 30% of the world?s giant oil fields and serve as modern day examples of unique biodiversity sites, typically operating as ... -
Flow cytometry and fecal indicator bacteria analyses for fingerprinting microbial pollution in karst aquifer systems
(2022)Microbial pollution of aquifers is a persistent water quality problem globally which poses significant risks to public health. Karst aquifer systems are exceptionally vulnerable to pollution from fecal contamination sources ...
