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Northwest Africa 12537 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12537 This is an OFFICIAL meteorite name. Abbreviation: NWA 12537 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 36 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 236 approved meteorites classified as Eucrite-br. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 5 Apr 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12537 (NWA 12537) (Northwest Africa) Purchased: 2018 Jul Classification: HED achondrite (Eucrite, brecciated) History: Purchased by Mbark Arjdal in July 2018 from an Algerian dealer. Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of closely-packed eucrite clasts in a very sparse matrix (~2 vol.%). The clasts exhibit two very different textures: fine-grained ophitic and very fine-grained granulitic with larger pyroxene and plagioclase relics. Minerals are unexsolved pigeonite (of the same color in both lithologies), anorthite, silica polymorph, ilmenite and troilite. Geochemistry: Pigeonite (Fs51.4-53.0Wo14.0-11.0, FeO/MnO = 32-35, N = 3), anorthite (An90.6-90.8Or0.4, N = 2). Classification: Eucrite (genomict breccia). Specimens: 7.3 g including one polished thin section at UWB; remainder with Mr. M. Arjdal. | ||||||||||||||||||||||||||||
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) 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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