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Northwest Africa 12009
Basic information Name: Northwest Africa 12009
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12009
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 5.75 kg
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 316 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 11 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12009 (NWA 12009)

(Northwest Africa)

Purchased: 2017 Jun

Classification: Ordinary chondrite (LL3)

History: Purchased by Marc Jost in June 2017 from a Moroccan dealer at the Ensisheim Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, fairly closely packed chondrules (apparent diameter 950±610 µm, N = 24) are set in relatively fine grained matrix containing altered metal, merrillite and chlorapatite.

Geochemistry: Olivine (Fa1.2-98.0, Cr2O3 in ferroan examples 0.09-0.18 wt.%, mean 0.1±0.04 wt.%, N = 7), orthopyroxene (Fs2.1-17.0Wo0.4-2.4, N = 3), subcalcic augite (Fs47.1Wo31.2), augite (Fs9.4Wo42.5). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.61.

Classification: Ordinary chondrite (LL3).

Specimens: 22.7 g including one polished thin section at UWB; remainder held by SJS.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P 2017 Jun
Mass (g):5751
Pieces:24
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):1.2-98.0
Ferrosilite (mol%):10.1±7.4 (N=3)
Wollastonite (mol%):1.6±1.1
Magnetic suscept.:3.61
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.7
Type spec location:UWB
Main mass:M. Jost
Comments:Work name SJS18004; 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)
SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6846 approved meteorites from (Northwest Africa) (plus 2038 unapproved names)

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