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Northwest Africa 7409
Basic information Name: Northwest Africa 7409
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7409
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 25.4 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  CO3
Recommended:  CO3    [explanation]

This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 23 Apr 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 7409 (NWA 7409)

(Northwest Africa)

Purchased: Feb 2011

Classification: Carbonaceous chondrite (CO3)

Petrography: (A.E. Rubin, UCLA) Chondrules average ~150 μm in apparent diameter, as expected for a CO3 chondrite. None of the chondrules contains clear, transparent, colorless glass. Some low-Ca pyroxene grains exhibit polysynthetic twinning. A few percent of the rock consists of CAIs and AOIs.

Data from:
  MB104
  Table 0
  Line 0:
Date:P Feb 2011
Mass (g):25.4
Pieces:1
Class:CO3
Shock stage:low
Weathering grade:medium
Fayalite (mol%):12.5±19.2 (n=25)
Ferrosilite (mol%):7.3±13.6 (n=8)
Wollastonite (mol%):1.9±1.3 (n=8)
Classifier:A. Rubin, UCLA
Type spec mass (g):6.8
Type spec location:UCLA
Main mass:Utas
Finder:anonymous
Comments:Submitted by JUtas
Institutions
   and collections		 UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
JUtas: Jason Utas, United States (private address; updated 8 Jun 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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