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Northwest Africa 12765
Basic information Name: Northwest Africa 12765
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12765
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 15.95 kg
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 174 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 3 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12765 (NWA 12765)

(Northwest Africa)

Purchased: 2019 Mar

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in March 2019 by Darryl Pitt from a Mauritanian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of mineral clasts of anorthite, olivine (some of which is forsterite), low-Ca pyroxene, unexsolved pigeonite, subcalcic augite, chromite and ilmenite within a fine grained, sparsely microvesicular matrix containing minor secondary barite.

Geochemistry: Olivine (Fa1.8-77.2, FeO/MnO = 85-104, N = 4), low-Ca pyroxene (Fs28.2Wo4.0, FeO/MnO = 64), pigeonite (F30.2-45.1Wo11.8-11.9, FeO/MnO = 60-65, N = 2), subcalcic augite (Fs35.7Wo29.9, FeO/MnO = 59), anorthite (An96.8Or0.2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.1 g in the form of a polished endcut at UWB; remainder with DPitt.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2019 Mar
Mass (g):15949
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):1.8-77.2
Ferrosilite (mol%):28.2; 30.2-45.1
Wollastonite (mol%):4.0; 11.8-11.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 475; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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