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Northwest Africa 6912 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6912 This is an OFFICIAL meteorite name. Abbreviation: NWA 6912 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 400 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 29 Nov 2011 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 100:
Northwest Africa 6912 (NWA 6912) Northwest Africa Purchased: Feb 2011 Classification: HED achondrite (Eucrite, polymict) Petrography: Fragmental breccia composed of clasts of fine-grained ophitic, cumulate and granulitic eucrites and related debris plus ~5 vol.% of diogenitic orthopyroxene containing inclusions of chromite. Eucritic minerals include exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite and troilite. Geochemistry: Diogenitic orthopyroxene Fs24.0Wo2.4 FeO/MnO=27, host orthopyroxene Fs59.3-59.5Wo2.4, FeO/MnO=30, clinopyroxene exsolution lamellae Fs24.0-24.2Wo45.1-41.8, FeO/MnO=29. | ||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1532: |
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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) MMartin: P.O. Box 164, Kaaawa, HI 96730, United States; Website (private address; updated 14 Jul 2013) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |