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Northwest Africa 6867 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6867 This is an OFFICIAL meteorite name. Abbreviation: NWA 6867 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 462 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 22 Oct 2013 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 6867 (NWA 6867) (Northwest Africa) Purchased: 2011 Apr Classification: Ordinary chondrite (LL3) Petrography: (A. Irving and S. Kuehner, UWS) Unequilibrated specimen composed of relatively large (to 1 mm), well-formed chondrules in a fairly weathered matrix. Minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite and troilite. Geochemistry: Olivine (Fa1.4-35.0; Cr2O3 in ferroan olivine 0.14-0.80 wt.%, mean 0.38 wt.%, s.d. 0.23 wt.%, N = 8), orthopyroxene (Fs2.6-24.1Wo0.2-1.5), clinopyroxene (Fs3.3-10.4Wo43.7-37.8). Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed subsamples by laser fluorination gave δ18O 5.764, 5.547; δ17O 3.618, 3.459; Δ17O 0.582, 0.537 per mil. Classification: Chondrite (LL3.1). Subtype estimated to be 3.1 based on Cr2O3 range in ferroan olivine. Estimation of subtype based on chart (Fig. 15) in Grossman and Brearley (2005). | ||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB102 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||
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) OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |