Meteoritical Bulletin: Entry for Northwest Africa 12761

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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: 254 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	L6
Recommended:			L6 [explanation]

This is 1 of 12780 approved meteorites (plus 11 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

Writeup

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 (Fa_25.2±0.3(range Fa_25.0-25.5), N = 3), low-Ca pyroxene (Fs_21.1±0.8Wo_2.0±0.3(range Fs_20.7-22.3Wo_1.6-2.2), N = 4), augite (Fs_7.4Wo_47.2; Fs_9.5Wo_39.8).

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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Photos:

Credit	Photos
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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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