Martian dunite NWA 2737: Integrated spectroscopic analyses of brown olivine
نویسندگان
چکیده
منابع مشابه
Metal-saturated sulfide assemblages in NWA 2737: Evidence for impact-related sulfur devolatilization in Martian meteorites
NWA 2737, a Martian meteorite from the Chassignite subclass, contains minute amounts (0.010 ± 0.005 vol%) of metal-saturated Fe-Ni sulfides. These latter bear evidence of the strong shock effects documented by abundant Fe nanoparticles and planar defects in Northwest Africa (NWA) 2737 olivine. A Ni-poor troilite (Fe ⁄S = 1.0 ± 0.01), sometimes Cr-bearing (up to 1 wt%), coexists with micrometer-...
متن کاملXenon Isotopic Components in Nwa 2737– a Chassignite from the Hot Desert
Introduction: NWA 2737 recently recovered from the Moroccan sahara is a martian dunite. Based on mineralogy (e.g., 89.6 % olivine), major (Fe/Mn) and trace element chemistry as well as oxygen isotopic signature (∆O = 0.305), it has been identified as the second Chassignite [1, 2]. The meteorite however has a few differences from Chassigny pointing to differences in petrogenesis and martian evol...
متن کاملHeterogeneous Noble Gas Distribution in the Nwa 2737
Introduction: NWA 2737 is the second chassignite, whose brown colored appearance different from Chassigny would be due to shock metamorphism. Noble gas compositions so far reported for the NWA 2737 [1, 2] are largely different from those of Chassigny. High Xe/Xe up to ~2 observed in NWA 2737 might be shock-implanted Martian atmospheric Xe. Common ejection event at ∼11 Myr was suggested for NWA ...
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Introduction: The olivine-phyric basaltic shergottites (OPSs) have recently been recognized as a significant sub-group of the Martian meteorites. These rocks have many characteristics suggestive of a primitive nature such as high bulk and olivine-core Mg#s [1]. [2,3] conducted crystallization experiments using the composition of Yamato 980459 (Y98), an OPS. Results of these experiments show tha...
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The halogen concentrations of a number of Martian meteorites vary significantly, with larger variations observed in I/Cl compared to Br/Cl. One striking feature is the high I/Cl ratios associated with those meteorites found in Antarctica. Removal of low temperature, superficial contamination does not significantly reduce the I/Cl ratio [1], indicating that processing in Antarctica is responsibl...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2008
ISSN: 0148-0227
DOI: 10.1029/2007je002939