Publications

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Geochemical characterization of scoriaceous and unmelted micrometeorites from the Sør Rondane Mountains, East Antarctica: Links to chondritic parent bodies and the effects of alteration Vrije Universiteit Brussel

Flore Van Maldeghem, Matthias Van Ginneken, Bastien Soens, Felix Kauffman, Seppe Lampe, Lutz Hecht, Philippe Claeys, Steven Goderis

Micrometeorites originate from the interplanetary dust complex and continuously fall to the Earth's surface in large amounts. About 10 to 20% of micrometeorites are not melted upon reaching the Earth's surface, preserving the primary features and characteristics of the parent material. Consequently, unmelted micrometeorites, together with scoriaceous micrometeorites, an intermediate form between cosmic spherules and unmelted micrometeorites, ...

Impact mixing among rocky planetesimals in the early Solar System from angrite oxygen isotopes Vrije Universiteit Brussel

B. G. Rider-Stokes, Richard C. Greenwood, M. Anand, L.F. White, Ian A. Franchi, Vinciane Debaille, Steven Goderis, Lidia Pittarello, Takashi Mikouchi
Angrite meteorites are thought to represent ancient basaltic igneous rocks that formed inward of Jupiter’s orbit on the basis of their isotopic parameters such as ε50Ti, ε54Cr and Δ17O in addition to Fe/Mn ratios of pyroxene. New bulk oxygen isotope measurements of nine angrites, and of olivine ‘xenocrysts’ and groundmass fractions from three quenched angrites, however, reveal clear isotopic disequilibrium, implying an impact melt origin. ...

A comprehensive evaluation of sulfur isotopic analysis (δ34S and δ33S) using multi-collector ICP-MS with characterization of reference materials of geological and biological origin Vrije Universiteit Brussel

Katerina Rodiouchkina, Ilia Rodushkin, Steven Goderis, Frank Vanhaecke

Sulfur isotope ratios are often used as biogeochemical tracers to gain understanding of abiotic and biological processes involved in the sulfur cycle in both modern and ancient environments. There is however a lack of matrix-matched well-characterized isotopic reference materials that are essential for controlling the accuracy and precision. This study therefore focused on expanding and complementing the currently available sulfur isotope ...

The Chicxulub impact structure reveals the first in-situ Jurassic magmatic intrusions of the Yucatán Peninsula, Mexico Vrije Universiteit Brussel

Sietze Jan De Graaff, Catherine H. Ross, Jean-Guillaume Feignon, Pim Kaskes, Sean P. Gulick, Steven Goderis, Thomas Dehais, Ludovic Ferrière, Christian Koeberl
Impact events that create complex craters excavate mid- to lower-crustal rocks, offering a unique perspective on the interior composition and internal dynamics of planetary bodies. On the Yucatán Peninsula, Mexico, the surface geology mainly consists of ~3 km thick sedimentary rocks, with a lack of exposure of crystalline basement in many areas. Consequently, current understanding of the Yucatán subsurface is largely based on impact ejecta and ...

Fluid mobilization of rare earth elements, Th, and U during the terrestrial alteration of H chondrites Vrije Universiteit Brussel

Ryoga Maeda, Steven Goderis, Thibaut Van Acker, Frank Vanhaecke, Vinciane Debaille, Philippe Claeys
Abstract The chemical effects of terrestrial alteration, with a particular focus on lithophile trace elements, were studied for a set of H chondrites displaying various degrees of weathering from fresh falls to altered finds collected from hot deserts. According to their trace element distributions, a considerable fraction of rare earth elements (REEs), Th, and U resides within cracks observed in weathered meteorite specimens. These cracks ...

Strontium isotopes and concentrations in cremated bones suggest an increased salt consumption in Gallo-Roman diet Vrije Universiteit Brussel

Sarah Dalle, Christophe Snoeck, Amanda Sengeløv, Kevin Salesse, Marta Hlad, Rica Annaert, Tom Boonants, Mathieu Boudin, Giacomo Capuzzo, Carina Gerritzen, et al.
The high temperatures reached during cremation lead to the destruction of organic matter preventing the use of traditional isotopic methods for dietary reconstructions. Still, strontium isotope (87Sr/86Sr) and concentration ([Sr]) analyses of cremated human remains offer a novel way to assess changing consumption patterns in past populations that practiced cremation, as evidenced by a large amount of new data obtained from Metal Ages and ...