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Northwest Africa 772 | |||||||||||||||||
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Basic information | Name: Northwest Africa 772 This is an OFFICIAL meteorite name. Abbreviation: NWA 772 Observed fall: No Year found: 2000 Country: Western Sahara Mass: 71 g | ||||||||||||||||
Classification history: |
This is 1 of 82 approved meteorites classified as CK3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||
Writeup |
Writeup from MB 85:
Northwest Africa 772 Morocco Found 2000 October Carbonaceous chondrite (CK3) A 71 g, 90% crusted stone was found southwest of Raudat Haua by a person prospecting for meteorites. Mineralogy and classification (T. Bunch and J. Wittke, NAU): modes (vol%) are matrix = 58, chondrules = 32, sulfides = 7, Cr-magnetite = 2, refractory inclusions = 1; chondrule sizes range from 50 µm to > 1 mm; chondrule type modes (vol%) are porphyritic olivine = 21, porphyritic olivinepyroxene = 4, cryptocrystalline = 3, granular olivine = 3, other = 1; matrix is mostly unrecrystallized; fine-grained olivine, Fa35, NiO = 0.25 wt%; plagioclase, An80; Ca-rich pyroxene, Wo46Fs9; Ca-poor pyroxene, Fs19.6; contains Ni-rich sulfides and Cr-rich magnetite (Cr2O3 = up to 13.9 wt%); weathering grade, W0/1. Specimens: 13.8 g plus thin section, NAU; main mass with finder. | ||||||||||||||||
Data from: MB85 Table 4 Line 212: |
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Plots: | O isotopes: | ||||||||||||||||
Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Geography: |
Statistics: This is 1 of 117 approved meteorites from Saguia el Hamra, Western Sahara (plus 1 unapproved name) This is 1 of 280 approved meteorites from Western Sahara (plus 20 unapproved names) | ||||||||||||||||
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Revision history: |
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