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Northwest Africa 7031
Basic information Name: Northwest Africa 7031
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7031
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 1200 g
Meteoritical Bulletin:  MB 102  (2013)  LL3
Recommended:  LL3    [explanation]

This is 1 of 414 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 22 Oct 2013
Writeup from MB 102:

Northwest Africa 7031 (NWA 7031)

(Northwest Africa)

Purchased: 2011 Jul

Classification: Ordinary chondrite (LL3)

History: Purchased by Yinan Wang from Michael Cottingham in July 2011.

Physical characteristics: Very fresh specimen consisting of abundant closely-packed, pale colored, small- to medium-sized (to 0.5 mm) chondrules with very sparse black matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Closely-packed round chondrules in a very sparse fine grained matrix. Very low content of kamacite as isolated fresh grains.

Geochemistry: Olivine (Fa2.8-47.4), orthopyroxene (Fs2.8-36.5Wo0.3-1.5).

Classification: Chondrite (LL3). This fresh specimen has much less metal and smaller chondrules than in typical LL chondrites, and has many similarites to NWA 5717.

Specimens: The main mass is held jointly by Mr. Y. Wang and Mr. B. Reed. A total of 20.1 g of material is on deposit at PSF.

Data from:
  Table 0
  Line 0:
Place of purchase:Silver City, NM
Date:P 2011 Jul
Mass (g):1200
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):2.8-47.4
Ferrosilite (mol%):2.8-36.5
Wollastonite (mol%):0.3-1.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:PSF
Main mass:Y. Wang
Comments:YW11-1; submitted by P. Sipiera
   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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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