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Northwest Africa 7118
Basic information Name: Northwest Africa 7118
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7118
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 22 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L3.5
Recommended:  L3.5    [explanation]

This is 1 of 95 approved meteorites classified as L3.5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7118 (NWA 7118)

Northwest Africa

Purchased: 2011 Nov

Classification: Ordinary chondrite (L3.5)

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, closely packed medium-sized chondrules. Minerals are olivine, orthopyroxene, subcalcic augite, augite , sodic plagioclase, chromite, troilite and stained kamacite.

Geochemistry: Olivine (Fa0.4-53.9; Cr2O3 in ferroan olivines = 0.07-0.16 wt.%, mean 0.12, s.d. 0.03, N = 8), orthopyroxene (Fs1.9-22.6Wo0.5-3.4), subcalcic augite (Fs19.1Wo31.8), augite (Fs15.3Wo38.6).

Classification: Ordinary chondrite (L3.5). Subtype estimated to be 3.5 based on Cr2O3 range in ferroan olivine. Estimation of subtype based on histograms (Fig. 4) in Grossman and Brearley (2005).

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2011 Nov
Mass (g):22
Pieces:1
Class:L3.5
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.4-53.9, n=10
Ferrosilite (mol%):1.9-22.6
Wollastonite (mol%):0.5-3.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):4.9
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1320; 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)
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7308 approved meteorites from (Northwest Africa) (plus 1977 unapproved names)

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