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Northwest Africa 13182
Basic information Name: Northwest Africa 13182
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13182
Observed fall: No
Year found: 2019
Country: Mali
Mass:help 83 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 347 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 9 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13182 (NWA 13182)

Mali

Purchased: 2019 Aug

Classification: Ordinary chondrite (LL3)

History: Purchased by Mbark Arjdal in August 2019 from a dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed chondrules (apparent diameter 930 ± 510 µm, N = 23) are set in a medium-grained matrix containing stained kamacite, taenite, low-Ti chromite, troilite and pentlandite.

Geochemistry: Olivine (Fa23.6±13.7, range Fa0.7-45.6, N = 9; Cr2O3 in ferroan examples 0.01-0.52 wt.%, mean0.11 wt.%, sd 0.17 wt.%, N = 13), low-Ca pyroxene (Fs15.8±7.1Wo0.8±1.1, range Fs5.4-23.9Wo0.1-3.0, N = 6), pigeonite (Fs27.0Wo21.9), subcalcic augite (Fs1.7Wo32.4), diopside (Fs0.9Wo44.8). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.11.

Classification: Ordinary chondrite (LL3).

Specimens: 16.7 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2019 Aug
Mass (g):83
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):23.6±13.7
Ferrosilite (mol%):15.8±7.1
Wollastonite (mol%):0.8±1.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):16.7
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj AG1; 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)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 42 approved meteorites from Mali (plus 1 unapproved name)

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