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Northwest Africa 7836 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7836 This is an OFFICIAL meteorite name. Abbreviation: NWA 7836 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: 240 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||
Comments: | Approved 8 Nov 2014 | ||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 7836 (NWA 7836) (Northwest Africa) Found: 2011 Jun Classification: HED achondrite (Eucrite) History: Found in Morocco in June 2011 and purchased by GHupé from a Moroccan dealer at the Tucson Gem and Mineral Show in February 2013. Physical characteristics: A single, relatively coarse grained stone (240 g) with a weathered brownish exterior. The fresh interior consists of irregularly distributed grains of brown and black pyroxene and grayish white plagioclase. Petrography: (A. Irving and S. Kuehner, UWS) Composed predominantly of fairly coarse grained, unexsolved, partially shock-darkened pigeonite and highly recrystallized anorthite (consisting of very fine polygonal subgrains) with accessory silica polymorph, troilite (some as myriad blebs in pigeonite), chromite and Ni-free metal. This specimen has experienced significantly more shock than typical eucrites (estimated at stage S5). Geochemistry: Pigeonite (Fs44.0-45.0Wo11.4-12.5; FeO/MnO = 26-31). Classification: Eucrite (gabbroic, shocked). Specimens: A 26.8 g type specimen is housed at UCLA and a polished thin section prepared from additional material is at UWB. GHupé holds the main mass. | ||||||||||||||||||||||
Data from: MB103 Table 0 Line 0: |
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Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) 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) GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, 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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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