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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:help 125 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 431 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
Writeuphelp
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 (Fa24.9±14.7, range Fa2.9-38.2, N = 7), low-Ca pyroxene (Fs18.5±3.3Wo3.0±2.5, range Fs13.8-22.4Wo0.4-6.1, N = 5), subcalcic augite (Fs17.9Wo20.4; Fs22.2Wo34.0; 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
Find references in NASA ADS:
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Geography:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 79 approved meteorites from Mali (plus 2 unapproved names)

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