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Northwest Africa 10952
Basic information Name: Northwest Africa 10952
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10952
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 17.21 kg
Meteoritical Bulletin:  MB 105  (2016)  EL4
Recommended:  EL4    [explanation]

This is 1 of 21 approved meteorites classified as EL4.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 17 Dec 2016
Writeup from MB 105:

Northwest Africa 10952 (NWA 10952)

(Northwest Africa)

Purchased: 2005

Classification: Enstatite chondrite (EL4)

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

Physical characteristics: (P. Sipiera, PSF) A "6 sided" individual stone (17208 g) with a rounded triangular or pyramid shape, and approximate dimensions of 29 × 24 × 28 cm. Exterior surfaces range from brown-colored, smooth fusion crusted areas to rough eroded regions to a rusty-orange colored area. A cut surface reveals a dark brown interior with numerous altered metal grains and obvious round chondrules.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed RP chondrules (apparent diameter 500-1800 μm, mean 800 μm) are set in a relatively coarse-grained matrix containing prismatic enstatite grains and altered metal. Apart from predominant enstatite, accessory minerals include diopside, kamacite, daubreelite, troilite, schreibersite and oldhamite (partly altered to gypsum).

Geochemistry: Enstatite (Fs0.4-1.2Wo0.5-0.6, N = 3), diopside (Fs0.2Wo47.8), metal (in wt.%, Si 0.20-0.21, Ni 5.5-5.9, Co 0.43-0.50, N = 4). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.87.

Classification: Enstatite chondrite (EL4).

Specimens: 177 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):17208
Shock stage:S2
Weathering grade:W2
Ferrosilite (mol%):0.4-1.2; 0.2
Wollastonite (mol%):0.5-0.6; 47.8
Magnetic suscept.:4.87
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):177
Type spec location:PSF
Main mass:Hollis Collection
Comments:CHCS000; 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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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