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Northwest Africa 12520
Basic information Name: Northwest Africa 12520
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12520
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 16 kg
Meteoritical Bulletin:  MB 109  (2020)  LL6-melt breccia
Recommended:  LL6-melt breccia    [explanation]

This is 1 of 23 approved meteorites classified as LL6-melt breccia.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Nov 2020
Writeup from MB 109:

Northwest Africa 12520 (NWA 12520)

(Northwest Africa)

Purchased: 2018 Nov

Classification: Ordinary chondrite (LL6, melt breccia)

History: Purchased by Aziz Habibi in November 2018 from a Mauritanian dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fresh, shock-modified breccia consisting of clasts of petrographic type 6 and shock stage S1 (largely recrystallized with rare chondrule remnants and stained metal) in a very fine grained to glassy matrix (black to cinnamon-brown in thin section).

Geochemistry: Olivine (Fa30.8-31.2, N = 3), orthopyroxene (Fs25.1-25.5Wo2.2-1.6, N = 3), clinopyroxene (Fs10.5-10.6Wo42.9-42.7, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.95.

Classification: Ordinary chondrite (LL6 melt breccia).

Specimens: 83.5 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2018 Nov
Mass (g):16000
Class:LL6-melt breccia
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):30.8-31.2
Ferrosilite (mol%):25.1-25.5
Wollastonite (mol%):2.2-1.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):83.5
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 702; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann         
Robert Smart   
Wojciech Moscinski   

     This is 1 of 9776 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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