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Northwest Africa 10273
Basic information Name: Northwest Africa 10273
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10273
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 189.7 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  CK4
Recommended:  CK4    [explanation]

This is 1 of 105 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 3 Oct 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10273 (NWA 10273)

(Northwest Africa)

Purchased: 2013 Sep

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Dr. David Gregory in September 2013 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, separated chondrules (apparent diameter up to 2.9 mm) containing Cr-magnetite plus fine-grained amoeboid CAI are set in a dark matrix.

Geochemistry: Olivine (Fa30.8-30.9, N = 3), orthopyroxene (Fs24.6-25.3Wo0.5-1.1, N = 3), subcalcic augite (Fs13.7Wo33.0), augite (Fs10.7Wo47.4).

Classification: Carbonaceous chondrite (CK4).

Specimens: 21 g plus a polished thin section at ROM; the remainder is held by Gregory.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2013 Sep
Mass (g):189.71
Pieces:1
Class:CK4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):30.8-30.9
Ferrosilite (mol%):24.6-25.3
Wollastonite (mol%):0.5-1.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:ROM
Main mass:D. Gregory
Comments:ROM 039; submitted by A. Irving
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Gregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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