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| Northwest Africa 771 | |||||||||||||||||
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| Basic information | Name: Northwest Africa 771 This is an OFFICIAL meteorite name. Abbreviation: NWA 771 Observed fall: No Year found: 2000 Country: Western Sahara Mass:  313 g | ||||||||||||||||
| Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||
| Writeup |
Writeup from MB 85:
Northwest Africa 771 Morocco Found 2000 June Achondrite (ureilite) A 313 g stone was found near Nebca, Morocco, by a person prospecting for meteorites. Mineralogy and classification (T. Bunch and J. Wittke, NAU): has typical ureilite texture; contains reversely zoned olivine (Fa12–17; Cr = 0.7 wt%) and pigeonite (Fs17Wo10); average metal composition, Ni = 3.3 wt%, Si = 1.6 wt%, Cr = 0.25 wt%; troilite contains up to 9 wt% Cr and 1 wt% Ni; shock stage, S2; weathering grade, W1. Specimens: 21.2 g plus thin section, NAU; main mass with anonymous finder. | ||||||||||||||||
| Data from: MB85 Table 4 Line 211: |
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| 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:
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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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