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Northwest Africa 12647 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12647 This is an OFFICIAL meteorite name. Abbreviation: NWA 12647 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 193.4 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 93 approved meteorites classified as Lodranite. [show all] Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 9 Aug 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12647 (NWA 12647) (Northwest Africa) Purchased: 2019 Feb Classification: Primitive achondrite (Lodranite) History: Purchased in February 2019 by Darryl Pitt from a Mauritanian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed mainly of angular mineral grains of olivine (exhibiting undulose extinction), orthopyroxene and clinopyroxene (twinned) together with accessory chromite, altered metal, chlorapatite and troilite. Sparse polymineralic aggregates are also present. Minor amounts of secondary calcite are present as veinlets. The olivine and pyroxene grains (both individual grains and in the polymineralic aggregates) are up to 4 mm in size. Geochemistry: Olivine (Fa10.3-10.7, FeO/MnO = 23-24,N = 4), orthopyroxene (Fs10.1-10.6Wo3.2-2.5, FeO/MnO = 14-16, N = 2), clinopyroxene (Fs4.1-5.0Wo44.5-40.7, FeO/MnO = 9-10, N = 3). Classification: Lodranite (breccia). Specimens: 20.3 g including one polished thin section at UWB; remainder with DPitt. | ||||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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