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Northwest Africa 10493
Basic information Name: Northwest Africa 10493
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10493
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 48.9 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  CO3.0
Recommended:  CO3.0    [explanation]

This is 1 of 20 approved meteorites classified as CO3.0.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 3 Feb 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10493 (NWA 10493)

(Northwest Africa)

Purchased: 2013 Mar

Classification: Carbonaceous chondrite (CO3.0)

History: Purchased in Spain by Darryl Pitt in March 2013 from a Mauritanian dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Small, well-formed chondrules (apparent diameter 0.45 ± 0.3 mm; one 1.8 mm), mineral fragments and sparse, irregularly-shaped CAI are set in a deep brown matrix (~40 vol.%). Accessory phases include Al-free chromite, kamacite and pentlandite.

Geochemistry: Olivine (Fa0.5-87.4, Cr2O3 in ferroan olivine 0.29-0.67 wt.%, mean 0.40 wt.%, sd 0.10 wt.%, N = 20), orthopyroxene (Fs1.2-1.4Wo0.8-0.7, N = 2), clinopyroxene (Fs1.9Wo42.9; Fs1.0Wo49.3, N = 2).

Classification: Carbonaceous chondrite (CO3.0). The mean and range of Cr2O3 contents of ferroan olivine occurring as rims and as matrix grains is essentially the same as for Colony, which was designated as a CO3.0 by Grossman and Brearley (2005, Figure 5).

Specimens: 10.05 g including one polished thin section at UWB; remainder with DPitt.

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:
  MB105
  Table 0
  Line 0:
Place of purchase:Spain
Date:P 2013 Mar
Mass (g):48.9
Pieces:1
Class:CO3.0
Shock stage:S2
Weathering grade:low
Fayalite (mol%):0.5-81.5
Ferrosilite (mol%):1.2-1.4
Wollastonite (mol%):0.8-0.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):10.05
Type spec location:UWB
Main mass:D. Pitt
Comments:DP 734; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7009 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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