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Northwest Africa 12761
Basic information Name: Northwest Africa 12761
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12761
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 254 g
Classification
  history:
Recommended:  L6    [explanation]

This is 1 of 10924 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Jun 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12761 (NWA 12761)

(Northwest Africa)

Purchased: 2011 Dec

Classification: Ordinary chondrite (L6)

History: Purchased by Beat Booz in December 2011 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of lithic clasts consisting of rare chondrules in a recrystallized metal-bearing matrix plus disaggregated related crystalline debris.

Geochemistry: Olivine (Fa25.2±0.3 (range Fa25.0-25.5), N = 3), low-Ca pyroxene (Fs21.1±0.8Wo2.0±0.3 (range Fs20.7-22.3Wo1.6-2.2), N = 4), augite (Fs7.4Wo47.2; Fs9.5Wo39.8).

Classification: Ordinary chondrite (L6 breccia).

Specimens: 21.7 g including one polished thin section at UWB; remainder with Mr. B. Booz.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2011 Dec
Mass (g):254.3
Pieces:2
Class:L6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.2±0.3
Ferrosilite (mol%):21.1±0.8
Wollastonite (mol%):2.0±0.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.7
Type spec location:UWB
Main mass:B. Booz
Comments:Work name BB-39; 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Beat Booz         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2047 unapproved names)

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