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Northwest Africa 4391 | |||||||||||||
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Basic information | Name: Northwest Africa 4391 This is an OFFICIAL meteorite name. Abbreviation: NWA 4391 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||
Classification history: |
This is 1 of 400 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||
Comments: | Approved 24 Jul 2007 | ||||||||||||
Writeup![]() |
Writeup from MB 92:
Northwest Africa 4391 Northwest Africa Find: 2005 Achondrite (eucrite, polymict) History: An anonymous finder recovered the meteorite in northwest Africa.The main mass holder acquired the specimen in 2005 in Midelt, Morocco. Physical characteristics: A single stone weighing, 54.8 g with a grayish color and little fusion crust present was recovered. Petrography: (A. Greshake, MNB). The meteorite is a polymict breccia consisting of coarse basaltic and mineral clasts set into an abundant fine-grained groundmass. Mineral fragments are dominantly large plagioclase and exsolved low-Ca pyroxene. Minor phases include silica, ilmenite, and Al,Ti-rich chromite. Mineral compositions: Plagioclase (An85.5-95.9) and pyroxene (Fs41.7-54Wo2.6-20.1). Classification: Achondrite (eucrite, polymict); moderate shock, moderate weathering. Type specimens: A total of 11.4 g of sample plus one polished thin section are on deposit at MNB. Ralew holds the main mass. | ||||||||||||
Data from: MB92 Table 2 Line 64: |
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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. 92, MAPS 42, 1647-1694 (2007)
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Photos: |
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |