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Northwest Africa 12263
Basic information Name: Northwest Africa 12263
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12263
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 20.86 kg
Meteoritical Bulletin:  MB 108  (2020)  L3
Recommended:  L3    [explanation]

This is 1 of 851 approved meteorites (plus 2 unapproved names) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 27 Mar 2019
Writeup from MB 108:

Northwest Africa 12263 (NWA 12263)

(Northwest Africa)

Purchased: 2018 Jun

Classification: Ordinary chondrite (L3)

History: Purportedly found in Mali and purchased by Marc Jost from Abdelaziz Mouadine in Rissani, Morocco, in June 2018.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen composed of very closely packed, well-formed chondrules (apparent diameter 880±400 µm, N = 20) set in a sparse finer grained matrix containing lightly stained metal.

Geochemistry: Olivine (Fa0.6-35.4, Cr2O3 in ferroan examples 0.03-0.13 wt.%, mean 0.06±0.03 wt.%, N = 8), orthopyroxene (Fs3.9-27.8Wo0.3-1.4, N = 3), pigeonite (Fs20.9Wo20.0), diopside (Fs2.1Wo39.3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.69.

Classification: Ordinary chondrite (L3).

Specimens: 36.4 g including one polished thin section at UWB; remainder with SJS.

Data from:
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P 2018 Jun
Mass (g):20864
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):24.9±14.9 (n=8)
Ferrosilite (mol%):17.2±12.2 (n=3)
Wollastonite (mol%):0.8±0.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):36.4
Type spec location:UWB
Main mass:M. Jost/A. Mouadine
Comments:Work name SJS 18008; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 9776 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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