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Northwest Africa 7021
Basic information Name: Northwest Africa 7021
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7021
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 134 g
Meteoritical Bulletin:  MB 104  (2015)  CO3
Recommended:  CO3    [explanation]

This is 1 of 618 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 4 Sep 2015
Writeup from MB 104:

Northwest Africa 7021 (NWA 7021)

(Northwest Africa)

Purchased: 2009 Sep

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Blaine Reed in September 2009 from a Moroccan dealer at the Denver Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively small chondrules (apparent diameter up to 500 μm, mean 150 μm) and small CAI are set in a much finer grained matrix (~30 vol.%) containing accessory kamacite.

Geochemistry: Olivine (Fa0.5-46.7 Cr2O3 in ferroan examples = 0.07-0.20, mean 0.11±0.06 wt.%, N = 7), orthopyroxene (Fs1.6-3.7Wo0.8-0.9, N = 3), subcalcic augite (Fs26.6Wo36.3), diopside (Fs1.0Wo44.3).

Classification: Carbonaceous chondrite (CO3).

Specimens: 20.3 g including one polished thin section and a polished slice at PSF; main mass with Reed.

Data from:
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2009 Sep
Mass (g):134
Shock stage:low
Weathering grade:low
Fayalite (mol%):0.5-46.7
Ferrosilite (mol%):1.6-3.7
Wollastonite (mol%):0.8-0.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.3
Type spec location:PSF
Main mass:B. Reed
Comments:ST; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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