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Northwest Africa 13323
Basic information Name: Northwest Africa 13323
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13323
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 3.96 kg
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 49 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 3 Jul 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13323 (NWA 13323)

(Northwest Africa)

Purchased: 2020 Feb

Classification: Carbonaceous chondrite (CK3)

History: Purchased by Mbark Arjdal in February 2020 from a dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed granular and some BO chondrules (apparent diameter 950 ± 460 µm, N = 23) plus sparse very fine grained, irregularly-shaped CAI are set in a fine grained matrix (~25 vol.%, deep brown in thin section) containing troilite, altered Cr-magnetite and rare taenite. Chondrules contain rounded grains of Cr-magnetite, some of which has been altered to red-brown iron hydroxides.

Geochemistry: Olivine (Fa17.9±18.4, range Fa0.3-44.1, N = 6), low-Ca pyroxene (Fs3.6±5.0Wo2.0±2.4, range Fs0.6-9.4Wo0.5-4.8, N = 3), pigeonite (Fs1.1Wo11.5), subcalcic augite (Fs1.4Wo29.2; Fs1.1Wo35.8; N = 2), diopside (Fs0.8Wo40.3), magnetite (Cr2O3 = 0.2-7.0 wt.%, N = 2).

Classification: Carbonaceous chondrite (CK3).

Specimens: 20.2 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2020 Feb
Mass (g):3957
Pieces:1
Class:CK3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):17.9±18.4
Ferrosilite (mol%):3.6±5.0
Wollastonite (mol%):2.0±2.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 250; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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