A5064632903- Astro and Planetary Science
- Planetary Science and Exploration
- Geology and Paleoclimatology Research
- Marine and environmental studies
- Space Science and Extraterrestrial Life
- High-pressure geophysics and materials
- Space Exploration and Technology
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Space Satellite Systems and Control
- Earthquake Detection and Analysis
- High-Velocity Impact and Material Behavior
- Global Energy and Sustainability Research
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Gas Dynamics and Kinetic Theory
- Particle Dynamics in Fluid Flows
Museum für Naturkunde
2020-2022
Freie Universität Berlin
2020-2022
Impacts on Earth crucially influenced core formation and the subsequent evolution of Earth's mantle may have contributed to late accretion material. However, what extent present-day geochemical signature reflects processes accretion, how much material delivered by giant impacts smaller projectiles during was incorporated into remains unclear. To improve insight these processes, it is key importance comprehend impact-delivered metal droplets are dispersed subsequently settle in a terrestrial...
Abstract Differently aged impact melt in lunar samples is key to unveiling the early bombardment history of Moon. Due mixing products ejected from distant craters, interpretations origin are difficult. We use numerical modeling for a better quantitative understanding production impact‐induced and particular its distribution ejecta blankets craters with sizes ranging 1.5 50 km. approximate stratigraphy porosity gradient, which represents gradual transition upper regolith via megaregolith...
Abstract Melting and vaporization of rocks in impact cratering is mostly attributed to be a consequence shock compression. However, other mechanism such as plastic work decompression by structural uplift also contribute melt production. In this study we expand the commonly used method determine shock‐induced melting numerical models from peak pressure new approach account for additional heating due internal friction. We compare our with straight‐forward simply quantify temperature relative...
<p>1.    Introduction</p> <p>Impact melt rocks are the only lunar sample material that allows for absolute dating of impact events. Therefore, these samples key to unveiling early bombardment history Moon. However, due mixing products ejected from distant craters, interpretations difficult [1]. Here, we use iSALE2D shock physics code quantify production impact-induced and especially its distribution in ejecta blankets...
Planetary collisions play an important role in the compositional and thermal evolution of planetary system. The Moon-forming impact event is thought to be Earth’s last giant collision event, marking end main accretion phase Earth. This large (re)set conditions for subsequent thermochemical both bodies, Earth Moon. Large parts proto-Earth are melt as a consequence extent melting affects interior atmosphere. It critical address initial volume shape possible magma ocean after...
We revisit the long-standing problem of melt generation in impacts on terrestrial planets. Traditionally, estimates volumes are derived by semi-analytical models and parameterized results from hydrocode simulations that account for due to impact-induced shock (e.g., Bjorkman Holsapple 1987, Pierazzo at al. 1997). These so-called scaling laws take form a power law connects volume with impactor diameter velocity as well densities target internal energy melting, which assumed constant. While...