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Post Info TOPIC: Grove Mountains (GRV) 99027


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Grove Mountains 99027
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Grove Mountains 99027
Antarctica
Found 2000 February 8
Martian meteorite (lherzolitic shergottite)
This meteorite weighs 9.97 g, and most of the surface is covered by fusion crust. Classification and mineralogy (Lin and B. Miao, GIG; H. Wang and C. Lin, NU): it is composed mainly of coarse-grained orthopyroxene, olivine, clinopyroxene and plagioclase, with minor opaque minerals. There are two textures. In the larger part of the sections, olivine occurs as rounded euhedral grains, poikilitically enclosed in a megacryst of orthopyroxene; in the other side of the sections, it shows a cumulate texture, consisting of euhedral orthopyroxene, clinopyroxene, olivine and interstitial plagioclase. Chromite, the most common opaque phase, is euhedral and enclosed in pyroxenes. The mineral assemblage and textures are similar to the Allan Hills (ALHA) 77005 lherzolite

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RE: Grove Mountains (GRV) 99027
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We report the petrography, mineral chemistry and oxygen isotopic composition of GRV 99027, a new Martian meteorite recently collected during the 16th Chinese Antarctic Research Expedition. This meteorite consists of two textural regions. The interstitial region is characterized by the presence of plagioclase and phosphate, and higher FeO contents of olivine and orthopyroxene, in comparison with the poikilitic region. All of the observations are similar to the three known Martian lherzolites. We classify GRV 99027 as the fourth sample of Martian lherzolite.
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Grove Mountains (GRV) 99027 Martian meteorite was discovered on the 8th February, 2000, in the Grove Mountains, Antarctic.

Latitude:  73006'01" S, Longitude:   75014'13" E


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