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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Chaussidon, Marc Pack, Andreas Herwartz, Daniel Horstmann, Marian Ward, Dustin Decker, Stephan Vollmer, Christian Barrat, Jean-alix Bischoff, Addi |
| Description | Author Affiliation: Bischoff A ( Institut für Planetologie and bischoa@uni-muenster.de.); Horstmann M ( Institut für Planetologie and.); Barrat JA ( Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, 29280 Plouzané, France); Chaussidon M ( Institut de Physique du Globe, 75235 Paris, France); Pack A ( Geowissenschaftliches Zentrum, Universität Göttingen, 37077 Göttingen, Germany); Herwartz D ( Geowissenschaftliches Zentrum, Universität Göttingen, 37077 Göttingen, Germany); Ward D ( Institut für Planetologie and.); Vollmer C ( Institut für Mineralogie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany); Decker S ( Meteorite Museum, 55430 Oberwesel, Germany.); |
| Abstract | Volcanism is a substantial process during crustal growth on planetary bodies and well documented to have occurred in the early Solar System from the recognition of numerous basaltic meteorites. Considering the ureilite parent body (UPB), the compositions of magmas that formed a potential UPB crust and were complementary to the ultramafic ureilite mantle rocks are poorly constrained. Among the Almahata Sitta meteorites, a unique trachyandesite lava (with an oxygen isotope composition identical to that of common ureilites) documents the presence of volatile- and SiO2-rich magmas on the UPB. The magma was extracted at low degrees of disequilibrium partial melting of the UPB mantle. This trachyandesite extends the range of known ancient volcanic, crust-forming rocks and documents that volcanic rocks, similar in composition to trachyandesites on Earth, also formed on small planetary bodies â ¼ 4.56 billion years ago. It also extends the volcanic activity on the UPB by â ¼ 1 million years (Ma) and thus constrains the time of disruption of the body to later than 6.5 Ma after the formation of Ca-Al-rich inclusions. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 35 |
| Volume Number | 111 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2014-09-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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