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| Northwest Africa 7828 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 7828 This is an OFFICIAL meteorite name. Abbreviation: NWA 7828 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass:  4.77 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 59 approved meteorites classified as Brachinite. [show all] Search for other: Brachinites, Primitive achondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 14 Nov 2013 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 102:
Northwest Africa 7828 (NWA 7828) (Northwest Africa) Purchased: 2013 Mar Classification: Primitive achondrite (Brachinite) History: Purchased in Temara, Morocco, by Adam Aaronson in December 2012. Petrography: (A. Irving and S. Kuehner, UWS) Protogranular assemblage of predominantly olivine with subordinate clinopyroxene, Ti-V-Al-bearing chromite and pyrrhotite. Some larger pyroxene grains contain rounded chadacrysts of olivine. Along the margins of olivine grains and also on interior fractures are distinctive arrays of intergrown pure Fe metal + orthopyroxene. Geochemistry: Olivine (Fa25.4-27.0; FeO/MnO = 41-52), clinopyroxene (Fs10.6-10.7Wo44.5-44.7; FeO/MnO = 25-29), orthopyroxene (Fs20.8-21.0Wo0.9-1.2; FeO/MnO = 32-33). Classification: Achondrite (brachinite, anomalous). The reduction textures associated with olivine make this specimen distinct from typical brachinites. The very close similarity in textures and mineral compositions to those in NWA 7605 suggests that these are paired stones. Specimens: 20.1 g of material and one polished thin section are at UWB. The remaining material is held by Aaronson. | ||||||||||||||||||||||||||||||
| Data from: MB102 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) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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| Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||||
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| Revision history: |
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