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Northwest Africa 12972
Basic information Name: Northwest Africa 12972
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12972
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1013 g
Meteoritical Bulletin:  MB 108  (2020)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3162 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Dec 2019
Writeup from MB 108:

Northwest Africa 12972 (NWA 12972)

(Northwest Africa)

Purchased: 2017 Mar

Classification: Ordinary chondrite (LL5)

History: Purchased by Adam Aaronson in March 2017 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Sparse chondrules occur within a recrystallized matrix containing lightly-stained metal.

Geochemistry: Olivine (Fa33.3±0.1 (range Fa33.2-33.5, N = 6), low-Ca pyroxene (Fs26.8±0.2Wo2.5±0.1 (range Fs26.4-27.1Wo2.3-2.6, N = 6), high-Ca pyroxene (Fs11.0Wo43.9).

Classification: Ordinary chondrite (LL5).

Specimens: 24 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2017 Mar
Mass (g):1013
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):33.3±0.1
Ferrosilite (mol%):26.8±0.2
Wollastonite (mol%):2.5±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.0
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M2013; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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