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Northwest Africa 7718
Basic information Name: Northwest Africa 7718
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7718
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 50.9 g
Meteoritical Bulletin:  MB 103  (2014)  CV3
Recommended:  CV3    [explanation]

This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 1 Jul 2014
Writeup from MB 103:

Northwest Africa 7718 (NWA 7718)

(Northwest Africa)

Purchased: 2012 Dec

Classification: Carbonaceous chondrite (CV3)

History: Purchased in Temara, Morocco by A. Aaronson in August 2012.

Petrography: (A. Irving and S. Kuehner, UWS). It contains chondrule from 0.6 to 1.5 mm (some containing grains of troilite and taenite) and sparse small CAIs in a fairly uniform brown, ferroan matrix. Olivine, orthopyroxene, subcalcic augite, diopside and very rare kamacite. A CAI contains gehlenite+perovskite+spinel, and one other object consists of diopside+pleonaste+perovskite.

Geochemistry: Olivine (Fa0.6-56.6; Cr2O3 in ferroan olivine = 0.05-0.47 wt.%, mean = 0.20 wt.%, sd = 0.18 wt.%, N = 8), orthopyroxene (Fs0.6-1.1Wo1.0), subcalcic augite (Fs3.8Wo35.2), diopside (Fs1.1Wo51.3).

Classification: Carbonaceous chondrite (CV3).

Specimens: A total of 26.8 g of material and one polished thin section are on deposit at UWB. Aaronson holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2012 Dec
Mass (g):50.9
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):0.6-56.6
Ferrosilite (mol%):0.6-1.1
Wollastonite (mol%):1.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):11
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1475; submitted by A. Irving
   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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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