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Northwest Africa 12005
Basic information Name: Northwest Africa 12005
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12005
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 223 g
Meteoritical Bulletin:  MB 108  (2020)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2834 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 20 Oct 2019
Writeup from MB 108:

Northwest Africa 12005 (NWA 12005)

(Northwest Africa)

Purchased: 2017 Sep

Classification: Ordinary chondrite (LL6)

History: Purchased by Blaine Reed in September 2017 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of highly recrystallized clasts in a finer grained matrix containing altered metal and chlorapatite. All but three clasts in the studied thin section are devoid of recognizable chondrules and exhibit metamorphic textures, but several possible chondrule remnants were noted.

Geochemistry: Olivine (Fa30.8-31.0, N = 3), orthopyroxene (Fs25.5-25.6Wo1.9-1.8, N = 3), clinopyroxene (Fs10.4-10.7Wo44.2-43.1, N = 2).

Classification: Ordinary chondrite (LL6).

Specimens: 20.7 g including one polished thin section at UWB; remainder with Mr. B. Reed.

Data from:
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2017 Sep
Mass (g):223.4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):30.8-31.0
Ferrosilite (mol%):25.5-25.6
Wollastonite (mol%):1.9-1.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.7
Type spec location:UWB
Main mass:B. Reed
Comments:Work name BR 105; 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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
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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