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Northwest Africa 7040
Basic information Name: Northwest Africa 7040
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7040
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 1740 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  H3.4
Recommended:  H3.4    [explanation]

This is 1 of 17 approved meteorites classified as H3.4.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Apr 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7040 (NWA 7040)

(Northwest Africa)

Purchased: 2011 Nov

Classification: Ordinary chondrite (H3.4)

Petrography: Well-developed small, round chondrules and some angular mineral frgaments. Matrix is rich in ferroan olivine with pyrrhotite and altered kamacite. Minerals are olivine, orthopyroxene, subcalcic augite, sodic plagioclase, chromite, troilite and altered kamacite.

Geochemistry: Olivine (Fa2.2-44.4; Cr2O3 in ferroan olivine 0.09-0.28 wt.%, mean 0.15, s.d. 0.07, N = 7), orthopyroxene (Fs5.2-33.1Wo0.4-2.7), subcalcic augite (Fs9.4-23.9Wo32.6-36.5).

Classification: Ordinary chondrite (H3.4). Subtype estimated from Cr2O3 distribution in ferroan olivine based on recommendations by Grossman and Brearley (2005) and Bunch et al. (2012).

Data from:
  MB100
  Table 1
  Line 1588:
Place of purchase:Temara
Date:P 2011 Nov
Mass (g):1740
Pieces:1
Class:H3.4
Shock stage:S2
Weathering grade:W2/3
Fayalite (mol%):2.2-44.4
Ferrosilite (mol%):5.2-33.1
Wollastonite (mol%):0.4-2.7
Classifier:A. Irving and S. Kuehner, UWA
Type spec mass (g):22
Type spec location:UWS
Main mass:Aaronson
Comments:M1309; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
UWA: University of Western Australia, 35 Hackett Drive, Crawley, Western Australia 6009, Australia (institutional address; updated 29 May 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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