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Northwest Africa 12644
Basic information Name: Northwest Africa 12644
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12644
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 785 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  CV3
Recommended:  CV3    [explanation]

This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 27 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12644 (NWA 12644)

(Northwest Africa)

Purchased: 2019 Feb

Classification: Carbonaceous chondrite (CV3)

History: Purchased in February 2019 by Darryl Pitt from a Mauritanian dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed chondrules (granular, BO and PO; apparent diameter 980±440 µm, N = 21) and large amoeboid, very fine grained CAI are set in a finer matrix (sepia-brown in thin section).

Geochemistry: Olivine (Fa19.0±16.0 (range Fa1.9-44.4), N = 6), subcalcic augite (Fs0.9Wo33.4), augite (Fs1.9Wo40.5).

Classification: Carbonaceous chondrite (CV3).

Specimens: 22.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2019 Feb
Mass (g):785
Pieces:1
Class:CV3
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):19.0±16.0
Ferrosilite (mol%):0.9; 1.9
Wollastonite (mol%):33.4; 40.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.4
Type spec location:UWB
Main mass:DPitt
Comments:Work name MVCH 458; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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