Meteoritical Bulletin: Entry for Northwest Africa 7131

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Northwest Africa 7131

Basic information

Name: Northwest Africa 7131
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7131
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 40 g

Classification
history:

Meteoritical Bulletin:	MB 101	(2012)	CM2
Recommended:			CM2 [explanation]

This is 1 of 544 approved meteorites classified as CM2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Comments:

Approved 22 Aug 2012

Writeup

Writeup from MB 101:

Northwest Africa 7131 (NWA 7131)

(Northwest Africa)

Purchased: 2011 Oct

Classification: Carbonaceous chondrite (CM2)

History: Purchased by Gary Fujihara from a Morocco dealer in 2011 October.

Petrography: Small chondrules and angular mineral fragments in an orange-brown matrix containing finely intergrown cronstedtite, tochilinite and tiny sulfide grains.

Geochemistry: Olivine (Fa_0.6-50.0, Cr₂O₃ in ferroan olivine = 0.25-0.41 wt.%), orthopyroxene (Fs_0.8-9.8Wo_3.5-0.3), clinopyroxene (Fs_0.7Wo_35.2).

Classification: Carbonaceous chondrite (CM2).

Data from:
  MB101
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2011 Oct
Mass (g):	40
Pieces:	1
Class:	CM2
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	0.6-50.0
Ferrosilite (mol%):	0.8-9.8
Wollastonite (mol%):	3.5-0.3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	8
Type spec location:	UWB
Main mass:	G. Fujihara
Comments:	GF11-19; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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