Meteoritical Bulletin: Entry for Northwest Africa 6720

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Northwest Africa 6720

Basic information

Name: Northwest Africa 6720
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6720
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 6.5 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	CM2
Recommended:			CM2 [explanation]

This is 1 of 641 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 31 Jan 2012

Writeup

Writeup from MB 100:

Northwest Africa 6720 (NWA 6720)

(Northwest Africa)

Purchased: Jan 2011

Classification: Carbonaceous chondrite (CM2)

Petrography: Composed of dispersed, small chondrules (mostly granular types) and angular mineral clasts in a dark, reddish brown matrix containing phyllosilicates (cronstedtite), altered metal and troilite. Some chondrules have been partially replaced by phyllosilicates.

Geochemistry: Olivine Fa_0.6-30.2(Cr₂O₃ in ferroan examples averages 0.44 wt.%), orthopyroxene Fs_2.0Wo_0.6.

Data from:
  MB100
  Table 1
  Line 1495:

Place of purchase:	Erfoud
Date:	P Jan 2011
Mass (g):	6.5
Pieces:	1
Class:	CM2
Shock stage:	S1
Weathering grade:	W1
Fayalite (mol%):	0.6-30.2
Ferrosilite (mol%):	2.0
Wollastonite (mol%):	0.6
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	1.3
Type spec location:	UWS
Main mass:	G. Fujihara
Comments:	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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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)
Gerald Armstrong
Mirko Graul

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9927 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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