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Northwest Africa 14738
Basic information Name: Northwest Africa 14738
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14738
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 120 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 616 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 8 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14738 (NWA 14738)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Shun-Chung Yang in March 2021 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, relatively small chondrules (apparent diameter 180±110 µm, N = 24) and angular zoned olivine grains are set in a very fine grained matrix (~40 vol.%) containing kamacite (some altered) and troilite. No CAI were observed.

Geochemistry: Olivine (Fa15.1±14.1, range Fa0.4-39.5, N = 7; Cr2O3 in ferroan olivine 0.43-0.68 wt.%, mean 0.56±0.10 wt.%, N = 4), low-Ca pyroxene (Fs7.3±5.5Wo1.8±2.2, range Fs2.1-15.1Wo0.6-5.1, N = 4), subcalcic augite (Fs6.2Wo35.2), anorthite in chondrule (An100.0Or0.0).

Classification: Carbonaceous chondrite (CO3).

Specimens: 20.1 g including one polished endcut and one polished thin section at UWB; remainder with Mr. S.-C. Yang.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2021 Mar
Mass (g):120
Pieces:1
Class:CO3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):15.1±14.1
Ferrosilite (mol%):7.3±5.5
Wollastonite (mol%):1.8±2.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:S.-C. Yang
Comments:Work name SCY-52; 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. 111, in preparation (2022)
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
A. Irving      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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