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Northwest Africa 7124
Basic information Name: Northwest Africa 7124
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7124
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 712 g
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Sep 2013
Writeup from MB 102:

Northwest Africa 7124 (NWA 7124)

(Northwest Africa)

Purchased: 2011 Feb

Classification: HED achondrite (Eucrite)

History: Purchased by Reed in 2011 February from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed mainly of crystal debris derived from gabbroic eucrites (pigeonite, exsolved pigeonite, calcic plagioclase, silica polymorph, chromite and troilite). Isolated grains of altered metal (kamacite+taenite) associated with Ni-bearing troilite also are present, and the specimen is cross-cut by veinlets of goethite.

Geochemistry: Pigeonite (Fs39.6-39.8Wo11.0-10.5, FeO/MnO = 26-30), orthopyroxene host (Fs48.5Wo2.1, FeO/MnO = 25), clinopyroxene exsolution lamella (Fs21.1Wo42.3, FeO/MnO = 28).

Classification: Eucrite. The high content of altered metal is very unusual.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2011 Feb
Mass (g):712
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):39.6-39.8
Wollastonite (mol%):11.0-10.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):26.2
Type spec location:UWB
Main mass:B. Reed
Comments:BR 70; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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