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Northwest Africa 8746
Basic information Name: Northwest Africa 8746
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8746
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 69.9 g
Meteoritical Bulletin:  MB 104  (2015)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 283 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Feb 2015
Writeup from MB 104:

Northwest Africa 8746 (NWA 8746)

(Northwest Africa)

Purchased: 2014 Jul

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Darryl Pitt in July 2014 from a dealer in Mauritania.

Physical characteristics: Single stone (69.9 g) composed of pale clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed mainly of mineral clasts (anorthite, pigeonite, olivine, subcalcic augite, minor kamacite) plus rare mare basalt clasts and glass fragments within a finer grained matrix.

Geochemistry: Olivine (Fa32.0-48.3, FeO/MnO = 85-91, N = 3), pigeonite (Fs25.6-33.0Wo6.2-7.0, FeO/MnO = 57-66, N = 3), ferroan pigeonite (Fs60.6Wo19.3, FeO/MnO = 79), subcalcic augite (Fs51.0Wo33.4, FeO/MnO = 66), plagioclase (An96.6-97.2Or0.1-0.3, N = 3). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 8.0, Na2O 0.33; (in ppm) Sc 18.6, La 5.9, Sm 2.6, Eu 0.77, Yb 2.2, Lu 0.30, Th 1.1.

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 14.1 g including one polished endcut at UWB; the remainder is held by DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2014 Jul
Mass (g):69.9
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):32.0-48.3
Ferrosilite (mol%):25.6-60.6
Wollastonite (mol%):6.2-19.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):14.1
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC 58; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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