A5028193743- Astro and Planetary Science
- Geological and Geochemical Analysis
- Isotope Analysis in Ecology
- Astronomical and nuclear sciences
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Radioactive element chemistry and processing
- Stellar, planetary, and galactic studies
- Space Exploration and Technology
- Radioactive contamination and transfer
- Paleontology and Stratigraphy of Fossils
- Planetary Science and Exploration
- Nuclear Physics and Applications
Universität Hamburg
2023
Hamburg University of Technology
2023
University of Cologne
2015-2020
University of Bonn
2019
Dr. Brill + Dr. Steinmann (Germany)
2016
An impact at Chicxulub, Mexico, occurred 66 million years ago, producing a global stratigraphic layer that marks the boundary between Cretaceous and Paleogene eras. That contains elevated concentrations of platinum-group elements, including ruthenium. We measured ruthenium isotopes in samples taken from three Cretaceous-Paleogene sites, five other impacts 36 to 470 ancient 3.5-billion- 3.2-billion-year-old spherule layers. Our data indicate Chicxulub impactor was carbonaceous-type asteroid,...
We revise the tantalum isotope composition and present a protocol to search for anomalies in geological extraterrestrial materials.