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Northwest Africa 7603
Basic information Name: Northwest Africa 7603
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7603
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 126.9 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 7603 (NWA 7603)

(Northwest Africa)

Purchased: 2012

Classification: Enstatite achondrite

History: Purchased by Ralew in 2012 from a dealer in Erfoud, Morocco.

Physical characteristics: A single brown 126.9 g stone with abundant metal visible in the interior.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively coarse grained aggregate (grainsize up to 1.1 mm) with triple grain junction texture composed predominantly of enstatite with accessory Cr-bearing troilite, altered kamacite, taenite and intermediate plagioclase. Secondary goethite and minor calcite occur along grain boundaries.

Geochemistry: Enstatite (Fs0.1-0.2Wo0.6-0.8).

Classification: Enstatite achondrite.

Specimens: A total of 20 g of type material and one polished thin section are on deposit at UWB. The remaining material is held by Ralew.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012
Mass (g):126.9
Class:Enst achon
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):0.1-0.2
Wollastonite (mol%):0.6-0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWB
Main mass:S. Ralew
Comments:RA12-104; 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)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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