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Northwest Africa 7637
Basic information Name: Northwest Africa 7637
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7637
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 84.9 g
Meteoritical Bulletin:  MB 102  (2013)  Enst achon
Recommended:  Enst achon    [explanation]

This is 1 of 11 approved meteorites classified as Enst achon.   [show all]
Search for other: Achondrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 6 Sep 2013
Writeup from MB 102:

Northwest Africa 7637 (NWA 7637)

(Northwest Africa)

Purchased: 2010

Classification: Enstatite achondrite

History: Purchased by Hmani in Morocco in 2010.

Physical characteristics: A single brown 84.9 g stone with fresh, medium gray interior containing abundant metal.

Petrography: (A. Irving & S. Kuehner, UWS) Protogranular aggregate dominated by enstatite, with fairly abundant Si-bearing kamacite and Ti-Cr-bearing troilite, plus accessory sodic plagioclase, schreibersite, oldhamite, alabandite, and silica polymorph.

Geochemistry: Enstatite (Fs0.01-0.02Wo1.0-1.3).

Classification: Enstatite achondrite.

Specimens: A total of 17 g of type material and one polished thin section are on deposit at UWB. The remaining material is held by Hmani.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2010
Mass (g):84.9
Class:Enst achon
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):0.01-0.02, n=3
Wollastonite (mol%):1.0-1.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):17
Type spec location:UWB
Main mass:Hmani Inc.
Comments:OT04; 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)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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