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Northwest Africa 6861 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6861 This is an OFFICIAL meteorite name. Abbreviation: NWA 6861 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 625 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 29 Nov 2011 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 100:
Northwest Africa 6861 (NWA 6861) Northwest Africa Purchased: Feb 2011 Classification: Carbonaceous chondrite (CM2) Petrography: Small granular and PO chondrules (composed primarily of olivine, orthopyroxene, pigeonite and augite), angular olivine grains and very sparse CAIs (to 3 mm) set in a black, fine-grained matrix composed mainly of intergrown cronstedtite-tochilinite, framboidal or porous troilite (some Ni-bearing) and taenite. One CAI is composed mainly of melilite and calcite with minor spinel. Geochemistry: Olivine Fa0.2-51.2, orthopyroxene Fs1.4Wo0.9, pigeonite Fs1.0Wo13.8, augite Fs0.9-4.3Wo38.1-38.3. | ||||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1516: |
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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) |
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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 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |