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Northwest Africa 12630
Basic information Name: Northwest Africa 12630
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12630
Observed fall: No
Year found: 2019
Country: Algeria
Mass:help 233 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 183 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12630 (NWA 12630)

Algeria

Purchased: 2019 Feb

Classification: Lunar meteorite (feldspathic breccia)

History: Two stones excavated at the site of the very large find near Tindouf, Algeria, were purchased by Doug Ingalls in February 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of mineral clasts of anorthite, olivine, orthopyroxene, exsolved pigeonite and augite set in a much finer grained matrix containing magnesian ilmenite, troilite and sparse vesicles.

Geochemistry: Olivine Fa37.3±28.8 (Fa11.7-68.5, FeO/MnO = 82-99, N = 3), low-Ca pyroxene 20.1±4.0Wo3.8±0.8 (Fs17.3-22.9Wo3.2-4.4, FeO/MnO = 48-55, N - 2), augite (Fs19.7Wo40.4, FeO/MnO = 49), anorthite (An96.9Or0.0).

Classification: Lunar (feldspathic breccia).

Specimens: 20.6 g in the form of two polished endcuts at UWB; remainder with Mr. D. Ingalls.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019 Feb
Mass (g):233
Pieces:2
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):11.7-68.5
Ferrosilite (mol%):17.3-22.9
Wollastonite (mol%):3.2-4.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.6
Type spec location:UWB
Main mass:D. Ingalls
Comments:Work name DI19-1; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 980 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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