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Northwest Africa 7801 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7801 This is an OFFICIAL meteorite name. Abbreviation: NWA 7801 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 199 approved meteorites classified as CK5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||
Comments: | Approved 14 May 2015 | ||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 7801 (NWA 7801) (Northwest Africa) Purchased: Sep 2011 Classification: Carbonaceous chondrite (CK5) Physical characteristics: A complete, desert-varnished stone was found. The fusion crust was eroded along contraction cracks and appears leathery. Petrography: (A.E. Rubin, UCLA) Thin section contains 2-15 μm grains of pyrrhotite and magnetite. Average groundmass grain size is approximately 50 μm, plagioclase grains average 25 μm. Chondrules lack primary glass but are readily discernible. Geochemistry: Olivine Fa33.4±0.2 (n=14), Pyroxene Fs9.6±1.6 and Wo48.3±1.8(n=12). Classification: (A.E. Rubin, UCLA) Olivine and pyroxene homogeneity is consistent with type 4-6, plagioclase grain size is indicative of type 5. | ||||||||||||||||||||||||||
Data from: MB104 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) |
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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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |