Meteoritical Bulletin: Entry for Northwest Africa 12762

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Northwest Africa 12762

Basic information

Name: Northwest Africa 12762
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12762
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 336 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	CV3
Recommended:			CV3 [explanation]

This is 1 of 565 approved meteorites (plus 1 unapproved name) classified as CV3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites

Comments:

Approved 3 Aug 2019

Writeup

Writeup from MB 108:

Northwest Africa 12762 (NWA 12762)

(Northwest Africa)

Purchased: 2012 Oct

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Beat Booz in October 2012 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed PO and granular chondrules (apparent diameter 800 ± 240 µm, N = 22) together with very fine grained, irregularly-shaped CAI are set in a fine grained matrix (~30 vol.%, sepia-brown in thin section).

Geochemistry: Olivine (Fa_3.6±3.8(range Fa_0.3-8.0), N = 4), low-Ca pyroxene (Fs_1.1±0.4Wo_2.0±2.1(range Fs_0.9-1.6Wo_0.7-4.5), N = 3), diopside (Fs_1.2±0.1Wo_38.1±0.2(range Fs_1.-1.3Wo_38.4-37.7), N = 2).

Classification: Carbonaceous chondrite (CV3).

Specimens: 21.0 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 2012 Oct
Mass (g):	336.2
Pieces:	1
Class:	CV3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	3.6±3.8
Ferrosilite (mol%):	1.1±0.4
Wollastonite (mol%):	2.0±2.1
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	21.0
Type spec location:	UWB
Main mass:	B. Booz
Comments:	Work name BB-43; 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 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
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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 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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