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Northwest Africa 10697
Basic information Name: Northwest Africa 10697
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10697
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 151 g
Meteoritical Bulletin:  MB 105  (2016)  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 2 Sep 2016
Writeup from MB 105:

Northwest Africa 10697 (NWA 10697)

(Northwest Africa)

Purchased: 2016 Mar

Classification: Martian meteorite (Shergottite)

History: Purchased by Darryl Pitt in March 2016 from a dealer in Erfoud, Morocco.

Physical characteristics: Partly fusion-crusted stone (151 g). The interior exhibits dispersed, beige prismatic grains in a khaki-colored matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Poikilitic texture. Olivine chadacrysts are enclosed in relatively large, prismatic, simply-twinned pyroxene grains (up to 5 mm long with undulose extinction) accompanied by lath-like maskelynite grains (some in sheaf-like bundles with more acicular pyroxene). Accessory phases are Ti-poor chromite, Ti-rich chromite, ilmenite, Mg-bearing merrillite, pyrrhotite (some Ni-bearing) and minor baddeleyite.

Geochemistry: Olivine (Fa34.1-36.0, FeO/MnO = 48-49; Fa 46.4, FeO/MnO = 46; N = 3), pigeonite (Fs34.8-37.5Wo8.7-7.0; Fs27.3Wo11.1; FeO/MnO = 27-31; N = 4), augite (Fs17.3-19.1Wo38.0-31.7, FeO/MnO = 23-26, N =3), subcalcic augite (Fs21.8Wo24.4, FeO/MnO = 25), maskelynite (An50-52.7Or1.9-1.4, N = 2).

Classification: Martian (shergottite, poikilitic).

Specimens: 20.1 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2016 Mar
Mass (g):151
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):34.1-36.0: 46.4
Ferrosilite (mol%):34.8-37.5;27.3; 21.8; 17.3-19.1
Wollastonite (mol%):8.7-7.0; 11.1; 24.4; 38.0-31.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:D. Pitt
Comments:MCVICH 50; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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