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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:help 6.5 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  CM2
Recommended:  CM2    [explanation]

This is 1 of 533 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
Writeuphelp
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 Fa0.6-30.2 (Cr2O3 in ferroan examples averages 0.44 wt.%), orthopyroxene Fs2.0Wo0.6.

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:
CreditPhotos
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 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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