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Northwest Africa 771
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:help 313 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Ureilite
Meteoritical Bulletin:  MB 85  (2001)  Ureilite
MetBase:  v. 7.1  (2006)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 532 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Writeuphelp
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:
Origin or pseudonym:Nebca
Date:Jun 2000
Latitude:26°33.60'N
Longitude:11°33.33'W
Mass (g):313
Pieces:1
Class:Ureilite
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Geography:

Western Sahara
Coordinates:
     Catalogue of Meteorites:   (26° 34'N, 11° 33'W)
     Recommended::   (26° 33' 36"N, 11° 33' 20"W)
Note: the NHM and MetBase coordinates are 0.9 km apart

Statistics:
     This is 1 of 90 approved meteorites from Saguia el Hamra, Western Sahara
     This is 1 of 220 approved meteorites from Western Sahara (plus 19 unapproved names)
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