Geology: Recent submissions
Now showing items 101-120 of 315
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An investigation into the Bryozoa of Ireland including the distributional patterns of the marine Bryozoa of Ireland over the last 150 years
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2020)Bryozoans are sessile filter feeding marine invertebrates. Research in Ireland on bryozoans has been sparse in recent years but many studies were carried out in the early 1900's by researchers such as Albert Russell Nichols ... -
Volcanic crystals as time capsules of eruption history
(2018)Crystals formed prior to a volcanic event can provide evidence of processes leading to and timing of eruptions. Clinopyroxene is common in basaltic to intermediate volcanoes, however, its ability as a recorder of pre-eruptive ... -
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 ... -
The effect of cooling rate on immiscible silicate liquid microstructure: An example from the Palaeogene dykes of Northeast England
(2019)The migration and accumulation of immiscible silicate liquids may play a significant role in the differentiation of crustal magma bodies and the formation of some economic mineral deposits. However, our understanding of ... -
Neoproterozoic crystalline exotic clasts in the Polish Outer Carpathian flysch: remnants of the Proto-Carpathian continent?
(2019)Crystalline exotic boulders within the sedimentary sequences of the Outer Carpathians likely represent Proto-Carpathian basement, which was exposed and eroded during the Mesozoic and Cenozoic evolution of the Western ... -
Spatial and temporal trends in exhumation of the Eastern Himalaya and syntaxis as determined from a multitechnique detrital thermochronological study of the Bengal Fan
(2019)The Bengal Fan provides a Neogene record of Eastern and Central Himalaya exhumation. We provide the first detrital thermochronological study (apatite and rutile U-Pb, mica Ar-Ar, zircon fission track) of sediment samples ... -
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 ... -
A comparison of sampling methods for seawater microplastics and a first report of the microplastic litter in coastal waters of Ascension and Falkland Islands
(2018)To date there is no gold standard for sampling microplastics. Zooplankton sampling methods, such as plankton and Neuston nets, are commonly used to estimate the concentrations of microplastics in seawater, but their ability ... -
The marine isotope stage 1 to 5 cryptotephra record of Tenaghi Philippon, Greece: Towards a detailed tephrostratigraphic framework for the Eastern Mediterranean region
(2018)The iconic climate archive of Tenaghi Philippon (TP), NE Greece, allows the study of short-term palaeoclimatic and environmental change throughout the past 1.3 Ma. To provide high-quality age control for detailed palaeoclimate ... -
Combined zinc-lead isotope and trace-metal assessment of recent atmospheric pollution sources recorded in Irish peatlands
(2019)Atmospherically-fed Earth surface archives such as ombrotrophic peatlands, lake sediments, and ice consistently show an upward increase in Zn concentrations of hitherto unclear origin. Here, we present a combined stable ... -
Co-existing fluid and silicate inclusions in mantle diamond
(2006)We document the compositions of co-existing silicate macro-inclusions and fluid micro-inclusions in the fibrous coats of eight coated diamonds from the Panda kimberlite (Canada). The mineral inclusions in the diamond coats ... -
Quartz-bearing C-O-H fluid inclusions diamond: Retracing the pressure-temperature path in the mantle using calibrated high temperature IR spectroscopy
(2007)Infrared spectra of C–O–H micro-inclusions were collected from a micro-inclusion bearing diamond during step-heating and freezing experiments to examine fluid speciation as a function of pressure and temperature. The ... -
Does Large Igneous Province Volcanism Always Perturb the Mercury Cycle? Comparing the Records of Oceanic Anoxic Event 2 and the End-cretaceous to Other Mesozoic Events
(2018)Mercury (Hg) is increasingly being used as a sedimentary tracer of Large Igneous Province (LIP) volcanism, and supports hypotheses of a coincidence between the formation of several LIPs and episodes of mass extinction and ... -
Broadband Surface Wave Tomography of Ireland, Britain and Other Regions
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)Over the last decades, seismic surface-wave studies have produced increasingly detailed images of the Earth s structure at a regional scale. In this study, we have tuned well-established techniques and when required ... -
Trace element and Pb isotope fingerprinting of atmospheric pollution sources: A case study from the east coast of Ireland
(2018)Unravelling inputs of multiple air pollution sources and reconstructing their historic contribution can be a difficult task. Here, new trace metal concentrations and Pb isotope data were combined for a radionuclide ... -
An exsolution origin for Archean mantle garnet
(2017)It is well established that the cratonic subcontinental lithospheric mantle (C-SCLM) represents a residue of extensively melted peridotite. The widespread occurrence of garnet in C-SCLM remains a paradox because experiments ... -
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 ... -
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 ... -
Simultaneous eruptions from multiple vents at Campi Flegrei (Italy) highlight new eruption processes at calderas
(2016)Volcanic eruptions are typically characterized by the rise and discharge of magma at the surface through a single conduit-vent system. However, in some cases, the rise of magma can be triggered by the activation of eruptive ... -
A study of alteration and mineralisation at the Mace Mo-Cu Porphyry deposit, Ireland
(Trinity College Dublin. School of Natural Sciences. Discipline of Geology, 2019)The Mace molybdenum-copper (Mo-Cu) deposit in the west of Ireland has been explored since the early 1960s, but remains poorly understood in terms of classic porphyry style systems. Knowledge of porphyry systems in general ...
