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Northwest Africa 13280 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13280 This is an OFFICIAL meteorite name. Abbreviation: NWA 13280 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 987 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 409 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 2 May 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13280 (NWA 13280) (Northwest Africa) Purchased: 2019 Jun Classification: HED achondrite (Eucrite, polymict) History: Purchased by Mbark Arjdal in June 2019 from an Algerian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Complex breccia composed of crystalline debris from several different types of eucrite together with minor (< 10 vol.%) diogenitic orthopyroxene. Major minerals are exsolved and unexsolved low-Ca, predominantly pigeonitic pyroxenes (some more magnesian, others more ferroan) and calcic plagioclase with accessory augite, silica polymorph, ilmenite, Ti chromite and troilite. Geochemistry: Diogenitic orthopyroxene (Fs24.3Wo2.7; Fs27.8Wo4.1; FeO/MnO = 25-29, N = 2), more magnesian low-Ca pyroxene (Fs34.7-39.4Wo4.5-8.4, FeO/MnO = 27-33, N = 3), more ferroan low-Ca pyroxene (Fs47.9-55.4Wo16.4-4.6, FeO/MnO = 29-33, N = 4), augite (Fs18.4Wo44.3, FeO/MnO = 25), fayalite (Fa75.3, FeO/MnO = 44), plagioclase (An89.4-92.0Or0.5-0.3, N = 3). Classification: Eucrite (polymict breccia). Specimens: 27.2 g including one polished thin section at UWB; remainder with Mr. M. Arjdal. | ||||||||||||||||||||||||||||||
Data from: MB109 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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