Meteoritical Bulletin: Entry for Northwest Africa 13755

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Northwest Africa 13755

Basic information

Name: Northwest Africa 13755
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13755
Observed fall: No
Year found: 2020
Country: Mali
Mass: 125 g

Classification
history:

Recommended:

LL3 [explanation]

This is 1 of 452 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 21 Feb 2021

Writeup

Writeup from MB 110:

Northwest Africa 13755 (NWA 13755)

Mali

Purchased: 2020 Jan

Classification: Ordinary chondrite (LL3)

History: Purchased by Mbark Arjdal in January 2020 from an dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed glass-bearing chondrules (apparent diameter 920±510 µm, N = 25) are set in a fine grained matrix containing stained kamacite, troilite, taenite and low-Ti chromite.

Geochemistry: Olivine (Fa_24.9±14.7, range Fa_2.9-38.2, N = 7), low-Ca pyroxene (Fs_18.5±3.3Wo_3.0±2.5, range Fs_13.8-22.4Wo_0.4-6.1, N = 5), subcalcic augite (Fs_17.9Wo_20.4; Fs_22.2Wo_34.0; N = 2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 3.53.

Classification: Ordinary chondrite (LL3).

Specimens: 24.4 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Timbuktu, Mali
Date:	P 2020 Jan
Mass (g):	125
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	24.9±14.7
Ferrosilite (mol%):	18.5±3.3
Wollastonite (mol%):	3.0±2.5
Magnetic suscept.:	3.53
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	24.2
Type spec location:	UWB
Main mass:	M. Arjdal
Finder:	anonymous
Comments:	Work name Arj ZM 370; 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Mali

Coordinates:

Unknown.

Statistics:
This is 1 of 93 approved meteorites from Mali (plus 2 unapproved names)

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