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Northwest Africa 7276 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7276 This is an OFFICIAL meteorite name. Abbreviation: NWA 7276 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: 380 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||
Comments: | Approved 18 Dec 2012 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 101:
Northwest Africa 7276 (NWA 7276) (Northwest Africa) Purchased: 2012 Classification: Ureilite History: Purchased by Derik Bowers in 2012 from a dealer in Alnif, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Protogranular aggregate composed almost entirely of slightly stained olivine with some preferred grain orientation, rare pigeonite and opaque, metal-rich zones along grain boundaries. Several inclusions of oldhamite were found within olivine, and there is minor secondary calcite in addition to minor iron hydroxide alteration of metal. Geochemistry: Olivine (cores Fa19.0-19.1, rim Fa13.5; Cr2O3 = 0.8 wt.%), pigeonite Fs16.3-16.7Wo5.9-5.8. Classification: Ureilite (dunitic). This stone is unusual because it is composed predominantly of olivine with almost no pyroxene. Specimens: 20 g of type material and one polished thin section are on deposit at UWB. The remaining material is held by Mr. D. Bowers. | ||||||||||||||||||||||||||||||
Data from: MB101 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. 101, MAPS 50, 1661, September 2015
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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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