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Northwest Africa 7937
Basic information Name: Northwest Africa 7937
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7937
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 152.9 g
Meteoritical Bulletin:  MB 102  (2013)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 298 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 30 Nov 2013
Writeup from MB 102:

Northwest Africa 7937 (NWA 7937)

(Northwest Africa)

Purchased: 2013

Classification: Martian meteorite (Shergottite)

History: Purchased by Ali and Mohammed Hmani in 2013 in Guelmim, Morocco.

Physical characteristics: Several small stones lacking fusion crust (total 152.9 g).

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fresh specimen with poikilitic to subequigranular texture consisting of zoned clinopyroxene, in places enclosing chadacrysts of olivine, along with intermediate plagioclase (completely converted to maskelynite), Cr-rich chromite, Ti-rich chromite, ilmenite, Ni-bearing pyrrhotite, merrillite and minor chlorapatite.

Geochemistry: Olivine (Fa36.7-39.4; FeO/MnO = 46-51), pigeonite (Fs27.7-29.7Wo16.3-10.0; FeO/MnO = 26-31), subcalcic augite (Fs19.7Wo26.9; FeO/MnO = 27).

Classification: Martian (shergottite, poikilitic). This specimen is very likely paired with NWA 7397, NWA 7387 and NWA 7755.

Specimens: 21.1 g and one polished thin section are at UWB. The remainder is held by Hmani.

Data from:
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2013
Mass (g):152.9
Class:Martian (shergottite)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):36.7-39.4
Ferrosilite (mol%):27.7-29.7; 19.7
Wollastonite (mol%):16.3-10.0; 26.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.1
Type spec location:UWB
Main mass:Hmani Inc.
Comments:OT07; 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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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