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Northwest Africa 13113
Basic information Name: Northwest Africa 13113
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13113
Observed fall: No
Year found: 2019
Country: Mali
Mass:help 1485 g
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1709 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Jan 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13113 (NWA 13113)

Mali

Purchased: 2019 Aug

Classification: Ordinary chondrite (L4)

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

Petrography: (A. Irving, UWS & J. Boesenberg, BrownU) Well-formed chondrules (some with devitrified glass) occur in a recrystallized matrix containing stained metal, troilite, ilmenite, chromite and chlorapatite.

Geochemistry: Olivine (Fa23.4±0.3 (range Fa22.8-23.7, N = 6), low-Ca pyroxene (Fs19.8±0.4Wo1.7±1.2 (range Fs19.5-20.3Wo1.0-3.8, N = 5).

Classification: Ordinary chondrite (L4).

Specimens: 64.5 g including one polished thin section at UWB; main mass with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2019 Aug
Mass (g):1485
Pieces:many
Class:L4
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):23.4±0.3
Ferrosilite (mol%):19.8±0.4
Wollastonite (mol%):1.7±0.2
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):64.5
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 35; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 45 approved meteorites from Mali (plus 1 unapproved name)

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