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Northwest Africa 10391
Basic information Name: Northwest Africa 10391
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10391
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 143.9 g
Meteoritical Bulletin:  MB 104  (2015)  LL4-7
Recommended:  LL4-7    [explanation]

This is 1 of 4 approved meteorites classified as LL4-7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Dec 2015
Writeup from MB 104:

Northwest Africa 10391 (NWA 10391)

(Northwest Africa)

Purchased: 2006 Feb

Classification: LL4-7

History: Purchased by Mike Silver in February 2006 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh breccia consisting of angular chondrite clasts plus some well-formed, discrete chondrules in a finer grained matrix. The most abundant clasts are entirely recrystallized with no relict chondrules (LL7), but also present are LL4 clasts and LL6 clasts containing rare chondrules. All components are compositionally equilibrated.

Geochemistry: Olivine (Fa31.5-31.6, N = 4), orthopyroxene (Fs24.5-24.8Wo2.5-2.4, N = 3), clinopyroxene (Fs10.8-11.8Wo43.4-40.4, N = 2).

Classification: Ordinary chondrite (LL4-7 breccia).

Specimens: 22 g including one polished thin section at ROM; remainder with Mr. M. Silver.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2006 Feb
Mass (g):143.86
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):31.5-31.6
Ferrosilite (mol%):24.5-24.8
Wollastonite (mol%):2.5-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22
Type spec location:ROM
Main mass:M. Silver
Comments:MS1; submitted by A. Irving
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 7741 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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