Meteoritical Bulletin: Entry for Northwest Africa 13353

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Northwest Africa 13353

Basic information

Name: Northwest Africa 13353
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13353
Observed fall: No
Year found: 2020
Country: Algeria
Mass: 222 g

Classification
history:

Recommended:

CO3 [explanation]

This is 1 of 642 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 7 Jul 2020

Writeup

Writeup from MB 109:

Northwest Africa 13353 (NWA 13353)

Algeria

Purchased: 2020 Mar

Classification: Carbonaceous chondrite (CO3)

History: Purchased by John Higgins in March 2020 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Small well-formed chondrules (apparent diameter 240 ± 140 µm, N = 22) together with some angular, zoned olivine grains and sparse very fine grained CAI are set in a fine grained matrix (~25 vol.%, brown in thin section) containing calcic plagioclase, kamacite and troilite plus minor secondary calcite and jarosite.

Geochemistry: Olivine (Fa_19.9±15.0, range Fa_0.8-38.2, N = 5; Cr₂O₃ in ferroan olivine = 0.02-0.09 wt.%), orthopyroxene (Fs_4.3±3.2Wo_2.1±1.8, range Fs_1.2-8.3Wo_0.3-4.2, N = 4), augite (Fs_4.0±3.9Wo_41.7±0.0, N = 2).

Classification: Carbonaceous chondrite (CO3).

Specimens: 20.4 g including one polished thin section at UWB; remainder with Mr. J. Higgins.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2020 Mar
Mass (g):	221.5
Pieces:	many
Class:	CO3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	19.9±15.0
Ferrosilite (mol%):	4.3±3.2
Wollastonite (mol%):	2.1±1.8
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	20.4
Type spec location:	UWB
Main mass:	J. Higgins
Comments:	Work name JH20-1; 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)

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Geography:

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1306 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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