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Northwest Africa 7643 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7643 This is an OFFICIAL meteorite name. Abbreviation: NWA 7643 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: 740 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 6 Sep 2014 | ||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 7643 (NWA 7643) (Northwest Africa) Purchased: 2012 Dec Classification: HED achondrite (Eucrite) History: Purchased by DPitt in December 2012 from a dealer in Erfoud, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Relatively coarse grained igneous aggregate of polycrystalline calcic plagioclase and exsolved pigeonite with accessory ilmenite and troilite. Not only has the plagioclase experienced moderate shock, the specimen is also cross-cut by dark brown, glassy shock melt veinlets. Geochemistry: Host orthopyroxene (Fs59.9-60.6Wo2.1-2.4; FeO/MnO = 29-31), clinopyroxene exsolution lamellae (Fs26.3-26.7Wo42.8-42.7; FeO/MnO = 29). Classification: Eucrite (unbrecciated, shocked). Specimens: 29.1 g of material and one polished thin section are on deposit at UWB. DPitt holds the main mass. | ||||||||||||||||||||||||
Data from: MB103 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) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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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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