Meteoritical Bulletin: Entry for Northwest Africa 14738

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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: 120 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	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 8 May 2022

Writeup

help

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 (Fa_15.1±14.1, range Fa_0.4-39.5, N = 7; Cr₂O₃ in ferroan olivine 0.43-0.68 wt.%, mean 0.56±0.10 wt.%, N = 4), low-Ca pyroxene (Fs_7.3±5.5Wo_1.8±2.2, range Fs_2.1-15.1Wo_0.6-5.1, N = 4), subcalcic augite (Fs_6.2Wo_35.2), anorthite in chondrule (An_100.0Or_0.0).

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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Photos:

Credit	Photos
Public domain photographs:
A. Irving

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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