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Northwest Africa 7971
Basic information Name: Northwest Africa 7971
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7971
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 52.6 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7971 (NWA 7971)

Morocco

Purchased: 2012

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Fred Hall and Kelly Manley from a Moroccan mineral dealer in Tucson, February, 2012.

Physical characteristics: Single stone, irregular dark-brown exterior. Saw cut reveals breccia with millimeter-sized clasts set in a brown-gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous equilibrated, coarse-grained, intersertal to sub-ophitic eucrite clasts, set in a fine-grained cataclastic matrix of the same mineralogical and chemical composition. Ubiquitous silica, chromite, ilmenite, and low-Ni iron metal.

Geochemistry: (C. Agee and N. Muttik, UNM)  Pyroxene Fs51.5± 3.8Wo12.5±5.0, Fe/Mn=32±1, n=25; plagioclase An88.6±2.9Ab10.7±2.7Or0.7±0.1, n=6.

Classification: Achondrite (Eucrite-mmict)

Specimens: 11 g including a probe mount on deposit at UNM, Fred Hall and Kelly Manley hold the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2012
Mass (g):52.6
Pieces:1
Class:Eucrite-mmict
Classifier:C. Agee, UNM
Type spec mass (g):11
Type spec location:UNM
Main mass:Fred Hall and Kelly Manley
Comments:Submitted by C. Agee
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1967 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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