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Northwest Africa 11852
Basic information Name: Northwest Africa 11852
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11852
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 45 g
Classification
  history:
Recommended:  LL7    [explanation]

This is 1 of 55 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 4 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11852 (NWA 11852)

(Northwest Africa)

Purchased: 2018 Feb

Classification: Ordinary chondrite (LL7)

History: Purchased by Fred Olsen in February 2018 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Triple grain junction texture with no chondrules or chondrule remnants. Relatively fine grained aggregate (mean grainsize ~150 ┬Ám ) of olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, chlorapatite, taenite and troilite.

Geochemistry: Olivine (Fa29.6-29.8, N = 3), orthopyroxene (Fs23.7-23.8Wo1.7-2.0, N = 3), clinopyroxene (Fs10.0-10.4Wo43.2-42.1, N = 2).

Classification: Ordinary chondrite (LL7).

Specimens: 9.2 g including one polished thin section at UWB; remainder with Mr. F. Olsen.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2018 Feb
Mass (g):45
Pieces:1
Class:LL7
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):29.6-29.8
Ferrosilite (mol%):23.7-23.8
Wollastonite (mol%):1.7-2.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):9.2
Type spec location:UWB
Main mass:F. Olsen
Comments:Work name FO18-1; 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)
Olsen: Unknown person (private address; updated 17 Apr 2009)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
A. Irving   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6551 approved meteorites from (Northwest Africa) (plus 2022 unapproved names)

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