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Northwest Africa 8317 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8317 This is an OFFICIAL meteorite name. Abbreviation: NWA 8317 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 218 approved meteorites classified as Eucrite-br. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 25 Nov 2014 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 103:
Northwest Africa 8317 (NWA 8317) (Northwest Africa) Purchased: 2014 Jan Classification: HED achondrite (Eucrite, brecciated) History: Purchased from a Moroccan dealer in New York City in January 2014 by Darryl Pitt. Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of both gabbroic and basaltic-textured eucrite clasts plus related mineral debris. The pyroxenes in all textural components have a distinctive pinkish clove brown color, suggesting that this is a genomict breccia. Minerals are exsolved pigeonite (unusually ferroan), calcic plagioclase, silica polymorph, ilmenite and troilite. Geochemistry: Host orthopyroxene (Fs63.8-64.2Wo2.0-2.2; FeO/MnO = 32-35), clinopyroxene exsolution lamellae (Fs27.5-27.8Wo43.6-43.1; FeO/MnO = 30-31). Classification: Eucrite, genomict breccia. Pyroxene in this specimen is unusually ferroan. Specimens: 20.1 g including one polished thin section at UWB. The remaining material is held by DPitt. | ||||||||||||||||||||||||||||
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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) 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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |