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Northwest Africa 11805 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11805 This is an OFFICIAL meteorite name. Abbreviation: NWA 11805 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 109.4 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 60 approved meteorites classified as Diogenite-pm. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 28 May 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11805 (NWA 11805) (Northwest Africa) Purchased: 2018 Jan Classification: HED achondrite (Diogenite, polymict) History: Purchased by Christopher Colvin in January 2018 from a dealer in Arizona, who had obtained the specimen from a Moroccan source. Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of angular mineral debris plus sparse lithic clasts of diogenite and microgabbroic eucrite. The majority (>90 vol.%) of the mineral debris is diogenitic (orthopyroxene, olivine, chromite) with minor eucritic exsolved pigeonite, calcic plagioclase, silica polymorph, Ti-chromite and troilite. Geochemistry: Diogenitic orthopyroxene (Fs23.4-24.5Wo2.3-2.0; Fs17.1Wo0.9; FeO/MnO = 27-32; N = 3), olivine (Fa28.9; Fa 52.0; FeO/MnO = 44-49; N = 2), orthopyroxene host (Fs44.7Wo3.5, FeO/MnO = 33), clinopyroxene exsolution lamella (Fs23.0Wo39.4, FeO/MnO = 26), plagioclase (An88.6-90.3Or0.5-0.4, N = 2). Classification: Diogenite (polymict breccia). Specimens: 21.1 g including one polished thin section at UWB; remainder with Mr. C. Colvin. | ||||||||||||||||||||||||||||||
Data from: MB107 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) 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. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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