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Northwest Africa 8667 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8667 This is an OFFICIAL meteorite name. Abbreviation: NWA 8667 Observed fall: No Year found: 2009 Country: (Northwest Africa) Mass: 559 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 848 approved meteorites (plus 2 unapproved names) classified as L3. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 18 Dec 2015 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 104:
Northwest Africa 8667 (NWA 8667) (Northwest Africa) Purchased: 2009 Mar Classification: Ordinary chondrite (L3) History: Purchased by Eric Twelker in March 2009 from a dealer in Pohlheim, Germany. Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, fairly closely packed chondrules occur in a finer grained, metal-bearing matrix. Geochemistry: Olivine (Fa0.4-92.1; Cr2O3 in ferroan olivine 0.11-0.61 wt.%, mean 0.23 wt.%, sd 0.12 wt.%, N = 16), orthopyroxene (Fs0.5-19.1Wo4.3-5.5, N = 3), subcalcic augite (Fs19.3Wo25.1, N = 1), augite (Fs7.4Wo38.7, N = 1). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.84. Classification: Ordinary chondrite (L3). L group designation based on magnetic susceptibility. The very wide range in Fa content of olivine, along with the mean value and standard deviation for Cr2O3 content of ferroan olivines, indicate that this unequilibrated specimen is of a subtype <3.2 (according to the criteria of Grossman and Brearley, 2005). Specimens: 21.2 g plus one polished thin section at UWB. The remainder is held by E. Twelker. | ||||||||||||||||||||||||||||||||
Data from: MB104 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) Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/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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