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Northwest Africa 7949
Basic information Name: Northwest Africa 7949
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7949
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 136 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  CO3
Recommended:  CO3    [explanation]

This is 1 of 554 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 26 Jul 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 7949 (NWA 7949)

(Northwest Africa)

Purchased: 2013 May

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Aaronson in Temara, Morocco in May 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Small (0.1-0.4 mm), well-formed chondrules plus sparse mineral fragments and fine grained, amoeboid CAI occur in a fine-grained matrix containing stained kamacite.

Geochemistry: Olivine (Fa0.7-40.4, N = 9; Cr2O3 in ferroan examples is 0.06-0.11 wt.%, mean 0.08 wt.%, s.d. 0.02 wt.%, N = 7), orthopyroxene (Fs1.0-3.2Wo1.0-1.1), augite (Fs1.2-1.6Wo45.2-48.7). Oxygen isotopes (D. Rumble, CIW): analyses of acid-washed subsamples gave, respectively δ17O = -7.85, -6.71; δ18O = -4.43, -3.43; Δ17O = -5.515, -4.913 per mil.

Classification: Carbonaceous chondrite (CO3).

Specimens: 20.1 g and one polished thin section are at UWB. The remainder is held by Aaronson.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2013 May
Mass (g):136
Pieces:1
Class:CO3
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):0.7-40.4
Ferrosilite (mol%):1.0-3.2
Wollastonite (mol%):1.0-1.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1564; submitted by A. Irving
Plots: O isotopes:  
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)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7368 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

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