A5031550082- Planetary Science and Exploration
- Methane Hydrates and Related Phenomena
- Astro and Planetary Science
- Geology and Paleoclimatology Research
- Space Exploration and Technology
- Paleontology and Stratigraphy of Fossils
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Geologic Mapping
Johns Hopkins University Applied Physics Laboratory
2018-2025
Abstract Troilite is a common phase in iron meteorites, but there are limited data available for the partitioning behavior of elements between troilite and solid metal. In this study, we present results experiments with coexisting Fe‐Ni metal, an S‐rich metallic liquid, troilite, conducted at 800–925°C evacuated silica tubes 1 atm. We report metal–troilite partition coefficients 22 commonly studied meteorites. find that chalcophile have affinity majority siderophile incompatible troilite. A...
There is strong evidence that Mercury's polar deposits are water ice hosted in permanently shadowed regions. In this study, we present new Arecibo radar observations of south pole, which reveal numerous radar-bright and substantially increase the imaging coverage. We also use images from MESSENGER's full mission to determine illumination conditions region at same spatial resolution as north region, enabling comparisons between two poles. The area roughly double found north, consistent with...
Many iron meteorites sample the metallic cores of planetesimals, providing a unique opportunity to study early Solar System planetary processes. Modeling chemical evolution during crystallization these meteorite groups provides evidence that both S and P were present as light elements in planetesimal cores. As fractional proceeded, concentrations residual liquid core increased, eventually, immiscibility Fe-Ni-S-P system would be expected encountered many cases. For example, IIAB IIG irons...