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Northwest Africa 7601
Basic information Name: Northwest Africa 7601
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7601
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 59 g
Meteoritical Bulletin:  MB 102  (2013)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 91 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 3 Jun 2013
Writeup from MB 102:

Northwest Africa 7601 (NWA 7601)

(Northwest Africa)

Purchased: 2012

Classification: Primitive achondrite (Acapulcoite)

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

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fine grained and equigranular (grain size 0.1-0.5 mm) with abundant triple grain junctions among silicate minerals. Composed of olivine, orthopyroxene, clinopyroxene, intermediate plagioclase, altered kamacite, chlorapatite, troilite and minor schreibersite. Moderate terrestrial alteration has produced secondary veinlets of goethite and calcite.

Geochemistry: Olivine (Fa11.1-11.2, FeO/MnO = 23-24), orthopyroxene (Fs11.2-12.1Wo2.7-3.1, FeO/MnO = 14), clinopyroxene (Fs5.2-6.3Wo47.1-45.3, FeO/MnO = 10-13).

Classification: Acapulcoite

Specimens: 12.2 g of sample and one polished thin section are on deposit at UWB. Ralew holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012
Mass (g):59
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):11.1-11.2
Ferrosilite (mol%):11.2-12.1; 5.2-6.3
Wollastonite (mol%):2.7-3.1; 47.1-45.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.2
Type spec location:UWB
Main mass:Ralew
Comments:RA12-102; 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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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