Meteoritical Bulletin: Entry for Northwest Africa 13348

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Northwest Africa 13348

Basic information

Name: Northwest Africa 13348
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13348
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 69 g

Classification
history:

Recommended:

CH3 [explanation]

This is 1 of 28 approved meteorites classified as CH3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CH chondrites, CH-CB family, and Metal-rich meteorites

Comments:

Approved 7 Jul 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13348 (NWA 13348)

(Northwest Africa)

Purchased: 2020 Apr

Classification: Carbonaceous chondrite (CH3)

History: Purchased by Mark Lyon in April 2020 from a Moroccan dealer.

Physical characteristics: A single small (69 g), dark and fairly dense stone. A polished interior surface exhibits abundant fine grained metal.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very small chondrules, chondrule fragments and silicate mineral clasts (apparent diameter 45±19 µm, N = 25) accompanied by relatively abundant grains of metal (~25 vol.%) are set within an even finer grained matrix. Metal is predominantly kamacite with inclusions of taenite and Cr-troilite.

Geochemistry: Olivine (Fa_17.5±15.5, range Fa_2.0-41.1, N = 7), low-Ca pyroxene (Fs_9.4±9.7Wo_2.9±2.0, range Fs_1.8-25.1Wo_0.0-4.6, N = 6), pigeonite (Fs_1.9Wo_7.9), subcalcic augite (Fs_2.4Wo_29.1), augite (Fs_10.0Wo_43.1), aluminous diopside (Fs_0.5Wo_58.7, Al₂O₃ = 15.9 wt.%), plagioclase (An_86.4Or_0.1), kamacite (Ni 4.9 wt.%), Si-bearing kamacite (Ni 6.6 wt.%, Cr 0.7 wt.5, Si 6.0 wt.%). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 5.34.

Classification: Carbonaceous chondrite (CH3).

Specimens: 14.1 g including one polished endcut at UWB; remainder with Mr. M. Lyon.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2020 Apr
Mass (g):	69
Pieces:	1
Class:	CH3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	17.5±15.5
Ferrosilite (mol%):	9.4±9.7
Wollastonite (mol%):	2.9±2.0
Magnetic suscept.:	5.34
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	14.1
Type spec location:	UWB
Main mass:	M. Lyon
Comments:	Work name ZLI27; 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 Meteoritical Bulletin, no. 109, in preparation (2020)

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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