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Northwest Africa 13507 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13507 This is an OFFICIAL meteorite name. Abbreviation: NWA 13507 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 84 approved meteorites classified as Lodranite. [show all] Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 23 Jan 2021 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13507 (NWA 13507) (Northwest Africa) Purchased: 2020 Jun Classification: Primitive achondrite (Lodranite) History: Purchased by Sun-Chung Yang and Juan Chen in June 2020 from an Algerian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of some lithic clasts with protogranular texture (grainsize up to 4 mm) plus related disaggregated crystalline debris in a very sparse fine grained matrix. Major minerals are olivine, low-Ca pyroxene (exhibiting polysynthetic twinning) and augite, accompanied by accessory Fe metal (partially altered to chlorine-bearing hydroxides), Cr-bearing troilite and small grains of schreibersite. Geochemistry: Olivine (Fa9.1-12.3, FeO/MnO = 16-23, N = 5), low-Ca pyroxene (Fs10.5-10.7Wo4.7-4.8, FeO/MnO = 13-14, N = 5), augite (Fs6.2-6.4Wo37.2-37.7, FeO/MnO = 10-11, N = 4). Classification: Lodranite (breccia). Specimens: 29.4 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen. | ||||||||||||||||||||||||||||||
Data from: MB110 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography: |
Statistics: This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names) |