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Northwest Africa 11703
Basic information Name: Northwest Africa 11703
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11703
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 5.31 kg
Meteoritical Bulletin:  MB 107  (2018)  Lunar (gabbro)
Recommended:  Lunar (gabbro)    [explanation]

This is 1 of 13 approved meteorites classified as Lunar (gabbro).   [show all]
Search for other: Lunar meteorites
Comments: Approved 27 Mar 2018
Writeup from MB 107:

Northwest Africa 11703 (NWA 11703)

(Northwest Africa)

Purchased: 2015 Apr

Classification: Lunar meteorite (gabbro)

History: Purchased by Darryl Pitt in April 2015 from a dealer in Erfoud, Morocco.

Physical characteristics: A single pale greenish stone (5309.1 g) with thin cross-cutting shock veinlets.

Petrography: (A. Irving and S. Kuehner, UWS) Medium grained (grainsize up to 1.4 mm) with cumulate texture. Major minerals are olivine, pigeonite, subcalcic augite and calcic plagioclase (predominantly converted to maskelynite with minor birefringent domains); accessory phases include ilmenite, taenite, troilite, Mg-merrillite and baddeleyite. Shock veinlets contain dark glass.

Geochemistry: Olivine (Fa32.1-32.4, FeO/MnO = 91-97, N = 3), pigeonite (Fs26.0Wo9.7; Fs27.7Wo5.7; FeO/MnO = 47-60; N = 2), subcalcic augite (Fs16.4-17.5Wo34.9-32.3, FeO/MnO = 46-52, N = 2), plagioclase (An89.7-91.2Or0.8-1.1, N = 2).

Classification: Lunar (gabbro). This specimen is texturally and mineralogically identical to NWA 2977, NWA 6950, NWA 8127, and to the olivine gabbro clasts in NWA 773, NWA 2700, NWA 2727 and NWA 3333, and evidently is paired with those lithologies.

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

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2015 Apr
Mass (g):5309.1
Class:Lunar (gabbro)
Shock stage:high
Weathering grade:low
Fayalite (mol%):32.1-32.4
Ferrosilite (mol%):26.0-27.8
Wollastonite (mol%):9.7-5.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MAC 133; 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. 107, MAPS 55, 460-462
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     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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