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Northwest Africa 10197
Basic information Name: Northwest Africa 10197
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10197
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 273 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  L4/5
Recommended:  L4/5    [explanation]

This is 1 of 74 approved meteorites (plus 1 unapproved name) classified as L4/5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Jun 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10197 (NWA 10197)

(Northwest Africa)

Purchased: 2009 Feb

Classification: Ordinary chondrite (L4/5)

History: Purchased by Philip Mani in February 2009 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed spherical chondrules (diameter 0.7-2.2 mm).

Geochemistry: Olivine (Fa24.3-24.8, N = 3), orthopyroxene (Fs20.3-20.4Wo1.7-1.5, N = 3), clinopyroxene (Fs6.6-7.6Wo45.8-41.5, N = 2).

Classification: Ordinary chondrite (L4/5).

Specimens: 20.52 g including one polished thin section at UWB; the remainder is held by Mr. P. Mani.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2009 Feb
Mass (g):273
Pieces:1
Class:L4/5
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):24.3-24.8
Ferrosilite (mol%):20.3-20.4
Wollastonite (mol%):1.7-1.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.52
Type spec location:UWB
Main mass:P. Mani
Comments:PCM15-M; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7009 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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