A5084879320- Astro and Planetary Science
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Isotope Analysis in Ecology
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Stellar, planetary, and galactic studies
- Paleontology and Stratigraphy of Fossils
- Space Exploration and Technology
- Geomagnetism and Paleomagnetism Studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Geochemistry and Elemental Analysis
- Radioactive element chemistry and processing
- Spacecraft and Cryogenic Technologies
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Space Science and Extraterrestrial Life
- Astrophysics and Star Formation Studies
- Geochemistry and Geologic Mapping
- Archaeology and ancient environmental studies
- Hydrocarbon exploration and reservoir analysis
- Radioactive contamination and transfer
- Nuclear Materials and Properties
- Mineralogy and Gemology Studies
Max Planck Institute for Solar System Research
2021-2025
University of Münster
2015-2024
National Museum of Nature and Science
2024
Max Planck Institute of Psychiatry
2024
Nanjing University
2024
Viking Development Group (Norway)
2019
ETH Zurich
2005-2015
University of Sopron
2014
University of Bern
2012
Université Libre de Bruxelles
2012
Significance Jupiter is the most massive planet of Solar System and its presence had an immense effect on dynamics solar accretion disk. Knowing age Jupiter, therefore, key for understanding how evolved toward present-day architecture. However, although models predict that formed relatively early, until now, formation has never been dated. Here we show through isotope analyses meteorites Jupiter’s solid core within only ∼1 My after start history, making it oldest planet. Through rapid...
It has been assumed that Nb and Ta are not fractionated during differentiation processes on terrestrial planets both elements lithophile. High-precision measurements of Nb/Ta Zr/Hf reveal is moderately siderophile at high pressures. values in the bulk silicate Earth (14.0 +/- 0.3) Moon (17.0 0.8) below chondritic ratio 19.9 0.6, contrast to Mars asteroids. The lunar constrains mass fraction impactor material less than 65%. Moreover, Moon-forming impact can be linked time with final...
Nucleosynthetic isotope anomalies are powerful tracers to determine the provenance of meteorites and their components, identify genetic links between these materials. Here we show that chondrules matrix separated from Allende CV3 chondrite have complementary nucleosynthetic Mo anomalies. These result enrichment a presolar carrier enriched in s-process into matrix, corresponding depletion this chondrules. This most likely is metal so uneven distribution material probably results...
Understanding core formation in meteorite parent bodies is critical for constraining the fundamental processes of protoplanet accretion and differentiation within solar protoplanetary disk. We report variations 5 to 20 parts per million (182)W, resulting from decay now-extinct (182)Hf, among five magmatic iron groups. These (182)W indicate that occurred over an interval ~1 years may have involved early segregation Fe-FeS a later Fe melts. Despite this protracted formation, probably accreted...
Carbonaceous meteorites are thought to be fragments of C-type (carbonaceous) asteroids. Samples the asteroid (162173) Ryugu were retrieved by Hayabusa2 spacecraft. We measured mineralogy and bulk chemical isotopic compositions samples. The samples mainly composed materials similar those carbonaceous chondrite meteorites, particularly CI (Ivuna-type) group. consist predominantly minerals formed in aqueous fluid on a parent planetesimal. primary altered fluids at temperature 37° ± 10°C, about...
The isotopic composition of meteorites reveals a fundamental dichotomy between non-carbonaceous (NC) and carbonaceous (CC) meteorites. However, the origin this dichotomy—whether it results from processes within solar protoplanetary disk or is an inherited heterogeneity system's parental molecular cloud—is not known. To evaluate NC–CC dichotomy, we report Ni data for comprehensive set iron meteorites, with special focus on groups that have been analyzed before belong to CC group. new...
We obtained Hf–W metal-silicate isochrons for several H chondrites of petrologic types 4, 5, and 6 to constrain the accretion high-temperature thermal history chondrite parent body. The silicate fractions have 180Hf/184W ratios up ∼ 51 182W/184W 33 ε units higher than whole-rock. These high radiogenic W isotope result in highly precise ages. ages become younger with increasing metamorphic grade range from ΔtCAI = 1.7 ± 0.7 Ma H4 Ste. Marguerite 9.6 1.0 H6 Kernouvé Estacado. Closure...
Abstract The isotopic dichotomy between non-carbonaceous (NC) and carbonaceous (CC) meteorites indicates that meteorite parent bodies derive from two genetically distinct reservoirs, which presumably were located inside outside the orbit of Jupiter remained isolated each other for first few million years solar system. Here we review discovery NC–CC its implications understanding early history system, including formation Jupiter, dynamics terrestrial planet formation, origin nature Earth’s...