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Northwest Africa 4925 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 4925 This is an OFFICIAL meteorite name. Abbreviation: NWA 4925 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||
Comments: | Approved 8 Sep 2008 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 94:
Northwest Africa 4925 Erfoud, Morocco Find: 2007 Achondrite (Martian, olivine-phyric shergottite) History: The meteorite was found by an anonymous person in northwest Africa and bought by the main mass holder in Erfoud, Morocco. Physical characteristics: One fragment partly covered by fusion crust weighing 282.3 g was found. Petrography: (A. Greshake, MNB) The meteorite displays a porphyritic texture with large chemically zoned olivine megacrysts set into a fine-grained groundmass composed of pyroxene and maskelynite. Minor phases include chromite, sulfides, phosphates, and small Fe-rich olivines. The olivine megacrysts often contain melt inclusions and small chromites. Geochemistry: Mineral composition (EMPA): Olivine, Fa27.6–46.8; pyroxene, Fs20.0–37.7Wo3–14.8; maskelynite, An67–69. Classification: Achondrite (Martian, olivine-phyric shergottite); severely shocked with some melt pockets; moderately weathered. Specimens: A total of 20.1 g plus one polished thin section are on deposit at MNB. Ralew holds the main mass. | ||||||||||||||||||||||||
Data from: MB94 Table 2 Line 85: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Geography: |
Statistics: This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |