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Northwest Africa 10540 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10540 This is an OFFICIAL meteorite name. Abbreviation: NWA 10540 Observed fall: No Year found: 2015 Country: (Northwest Africa) Mass: 122.7 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 280 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 27 Feb 2016 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 105:
Northwest Africa 10540 (NWA 10540) (Northwest Africa) Purchased: 2015 Oct Classification: HED achondrite (Eucrite, monomict) History: Purchased by John Higgins in October 2015 from a dealer in Laayoune, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of larger mineral grains (up to 2.2 mm across) within a finer matrix of the same minerals. The main components are finely exsolved pigeonite and calcic plagioclase with accessory silica polymorph, ilmenite, Ti-free chromite and troilite. Some composite grains with pyroxene and plagioclase in contact are present. Geochemistry: Host orthopyroxene (Fs46.8-48.3Wo3.4-1.5, FeO/MnO = 31-32, N = 3), clinopyroxene exsolution lamellae (Fs17.3-19.1Wo45.3-44.6, FeO/MnO = 28, N = 3). Classification: Eucrite (monomict gabbroic breccia). Specimens: 26 g including one polished thin section at UWB; remaining material with Mr. J. Higgins. | ||||||||||||||||||||||||||||
Data from: MB105 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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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