Martian soil component in impact glasses in a Martian meteorite
| Autor: | L. E. Borg, S. J. Wentworth, M. N. Rao, D. S. McKay |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Geological Phenomena
Geochemistry Mars Mineralogy Electron microprobe Impactite Martian soil engineering.material Feldspar Ferric Compounds Soil chemistry.chemical_compound Exobiology Aluminum Oxide Plagioclase Martian Geology Meteoroids Silicon Dioxide Silicate Microscopy Electron Geophysics chemistry Meteorite visual_art visual_art.visual_art_medium engineering General Earth and Planetary Sciences Glass Magnesium Oxide Sulfur Electron Probe Microanalysis |
| Zdroj: | Geophysical Research Letters. 26:3265-3268 |
| ISSN: | 0094-8276 |
| DOI: | 10.1029/1999gl005388 |
| Popis: | Chemical compositions of impact melt glass veins, called Lithology C (Lith C) in Martian meteorite EET79001 were determined by electron microprobe analysis. A large enrichment of S, and significant enrichments of Al, Ca, and Na were observed in Lith C glass compared to Lithology A (Lith A). The S enrichment is due to mixing of plagioclase- enriched Lith A material with Martian soil, either prior to or during impact on Mars. A mixture of 87% Lith A, 7% plagioclase, and 6% Martian soil reproduces the average elemental abundances observed in Lith C. Shock melting of such a mixture of plagioclase-enriched, fine-grained Lith A host rock and Martian soil could yield large excesses of S (observed in this study) and Martian atmospheric noble gases (found by Bogard et al., 1983) in Lith C. These mixing proportions can be used to constrain the elemental abundance of phosphorus in Martian soil. |
| Databáze: | OpenAIRE |
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