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Northwest Africa 10858
Basic information Name: Northwest Africa 10858
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10858
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 9.6 kg
Meteoritical Bulletin:  MB 105  (2016)  L3
Recommended:  L3    [explanation]

This is 1 of 727 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 22 Oct 2016
Writeup from MB 105:

Northwest Africa 10858 (NWA 10858)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (L3)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005 and subsequently acquired by the Hollis Collection.

Petrography: (A. Irving and S. Kuehner, UWS) Closely packed, well-formed chondrules (apparent diameter 400±300 μm, one 1.9 mm) are set in a sparse fine grained, black matrix. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.79.

Geochemistry: Olivine (Fa1.6-51.0, Cr2O3 in ferroan examples 0.02-0.31 wt.%, mean 0.11±0.12 wt.%, N = 9), orthopyroxene (Fs4.0-19.8Wo0.3-1.8, N = 3), pigeonite (Fs46.0Wo13.3), augite (Fs7.7Wo45.2).

Classification: Ordinary chondrite (L3).

Specimens: 107 g including one polished thin section at PSF; remainder in the Hollis Collection.

Data from:
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):9604
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):1.6-51.0
Ferrosilite (mol%):4.0-19.8
Wollastonite (mol%):0.3-1.8
Magnetic suscept.:4.79
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):107
Type spec location:PSF
Main mass:Hollis Collection
Comments:CHCS104; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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