A5058105055- Geological and Geochemical Analysis
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Astro and Planetary Science
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Geologic Mapping
- Planetary Science and Exploration
- Geochemistry and Elemental Analysis
- Radioactive element chemistry and processing
- Nuclear Physics and Applications
- Maritime and Coastal Archaeology
- Isotope Analysis in Ecology
- Atomic and Subatomic Physics Research
- Acute Myocardial Infarction Research
- Marine and environmental studies
- Geological and Geophysical Studies Worldwide
- Groundwater and Isotope Geochemistry
- Archaeological and Geological Studies
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- Geological and Geophysical Studies
- Glass properties and applications
- Extraction and Separation Processes
- Ion-surface interactions and analysis
University of Münster
2021-2024
Cardiff University
2020-2024
University of Bristol
2015-2024
Institute of Geochemistry
2016-2019
Vrije Universiteit Amsterdam
2015-2018
Abstract The origin of titanium-rich basaltic magmatism on the Moon remains enigmatic. Ilmenite-bearing cumulates in lunar mantle are often credited as source, but their partial melts not a compositional match and too dense to enable eruption. Here we use petrological reaction experiments show that ilmenite-bearing react with olivine orthopyroxene mantle, shifting melt composition high-Ti suite. New high-precision Mg isotope data confirm basalts have variable isotopically light compositions...
Abstract This study reports the first detailed geochemical characterization of Kolumbo submarine volcano in order to investigate role source heterogeneity controlling variability within Santorini volcanic field central Aegean arc. Kolumbo, situated 15 km northeast Santorini, last erupted 1650 AD and is thus closely associated with system space time. Samples taken by remotely‐operated vehicle that were analyzed for major element, trace element Sr‐Nd‐Hf‐Pb isotope composition include...
The use of a 10<sup>13</sup> Ω amplifier to increase the <sup>204</sup>Pb signal enables high-precision, double spike Pb isotope data be obtained for ng-size samples.
Research Article| May 01, 2016 Subslab mantle of African provenance infiltrating the Aegean wedge Martijn Klaver; Klaver Department Geology and Geochemistry, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081HV Netherlands *Current address: Bristol Isotope Group, School Earth Sciences, University Bristol, Wills Memorial Building, Queens Road, BS8 1RJ, UK; E-mail: martijn.klaver@bristol.ac.uk. Search for other works by this author on: GSW Google Scholar Gareth R. Davies; Davies Pieter Z....
Lavas and pyroclastic products of Nisyros volcano (Aegean arc, Greece) host a wide variety phenocryst cumulate assemblages that offer unique window into the earliest stages magma differentiation. This study presents detailed petrographic lavas, enclaves cumulates spanning entire volcanic history to elucidate at which levels in crust magmas stall differentiate. We present new division for two suites based on field occurrence features: low-porphyricity andesite high-porphyricity (rhyo)dacite...
Ever‐increasing precision in isotope ratio measurements requires a concomitant small bias within and between laboratories. The double spike technique is the most suitable method to obtain reliable composition data that are accurately corrected for instrumental mass fractionation. Compared with other methods, such as sample‐calibrator bracketing (SCB), only can correct all sources of fractionation after equilibration sample spike, incurred during chemical separation measurement. In addition,...
Abstract We employed MC‐ICP‐MS to measure the mass‐dependent Ca isotope compositions of Vesta‐related meteorites. Eucrites and diogenites show distinct compositions, which is caused by crystallization isotopically heavy orthopyroxene. The data support a model where two lithologies are linked, diogenites, mainly composed orthopyroxene crystallized from an eucritic melt. As normal eucrites main reservoir on Vesta, their δ 44/40 values (per mil 44 Ca/ 40 ratios relative NIST 915a) best...
The Bakhuis Granulite Belt (BGB) is a metamorphic terrain within the Guiana Shield that experienced ultrahigh-temperature (UHT) metamorphism at 2.07–2.05 Ga. In southwest of BGB, Kabalebo charnockites were emplaced ca. 1.99 Ga and thus postdate UHT by least 60 Myr. Two generations gabbroic intrusions have been recognized which could act as heat source for two events. A younger generation tholeiitic "Charlie" gabbros yields baddeleyite U/Pb age 1971 ± 15 Ma. presence overprint indicates...
Abstract We report new petrographic and geochemical observations on magmatic sulfides occurring in different enclave types, including hornblende and/or clinopyroxene‐rich cumulates, the host lavas, Nisyros (South Aegean volcanic arc). discuss our findings context of pre‐existing petrological thermobarometry studies. Our results indicate that become less abundant Cu‐richer (Cu median values) with magma differentiation at progressively lower pressure/ P ‐temperature/ T ‐depth conditions....