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Northwest Africa 13107
Basic information Name: Northwest Africa 13107
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13107
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 2.32 kg
Recommended:  LL7    [explanation]

This is 1 of 78 approved meteorites classified as LL7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 9 Feb 2020
Writeup from MB 109:

Northwest Africa 13107 (NWA 13107)

(Northwest Africa)

Purchased: 2018 Mar

Classification: Ordinary chondrite (LL7)

History: Purchased in Rissani, Morocco, by Adam Aaronson in March 2018.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Triple grain junction texture with no chondrules. Major minerals are olivine, orthopyroxene, rare high-Ca pyroxene and sodic plagioclase, together with accessory altered kamacite, chromite and chlorapatite.

Geochemistry: Olivine (Fa27.7±0.4 (range Fa27.1-28.1, N = 5), low-Ca pyroxene (Fs22.8±0.1Wo2.1±0.0 (range Fs22.7-22.9Wo2.1-2.2, N = 5), high-Ca pyroxene (Fs9.4±0.0Wo44.2±0.0 (range Fs9.3-9.4Wo44.2, N = 2), plagioclase (An38.6±0.0Or0.5±0.0 (rangeAn38.5-38.6Or0.5-0.6, N = 3).

Classification: Ordinary chondrite (LL7).

Specimens: 20.6 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P 2018 Mar
Mass (g):2320
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):27.7±0.4
Ferrosilite (mol%):22.8±0.1
Wollastonite (mol%):2.1±0.0
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.6
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M2117; submitted by A. Irving
   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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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