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Northwest Africa 7894 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7894 This is an OFFICIAL meteorite name. Abbreviation: NWA 7894 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: 36.6 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 522 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 25 Jun 2013 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7894 (NWA 7894) (Northwest Africa) Purchased: Jan 2011 Classification: HED achondrite (Diogenite) History: Bought on eBay in April 2012 from a seller who traded it as a single stone in January 2011. Physical characteristics: A single broken stone, ~70% covered by shiny fusion crust. Broken surface reveal a grayish interior with greenish, whitish and dark clasts up to a few mm in size set in a light-gray matrix. Petrography: (J. Gattacceca, CEREGE): Breccia composed predominantly of diogenitic material and less than 10 vol. % of basaltic eucrite clasts up to 2 mm. The dominant minerals are orthopyroxene, plagioclase, olivine. Silica, chromite, and troilite. Rare metal. Geochemistry: Orthopyroxene Fs23.5±2.6 Wo2.4±0.7 FeO/MnO=30.3, Plagioclase An89.7Or0.3, Olivine Fa 40.9±0.9 FeO/MnO = 51.0. Chromite Cr/(Cr+Al)= 0.79 Classification: HED achondrite (diogenite, polymict breccia). Minimal weathering. Specimens: 9 g and a polisehd section at CEREGE. Main mass with R. Lenssen. | ||||||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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