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Northwest Africa 10276
Basic information Name: Northwest Africa 10276
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10276
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 20.3 g
Meteoritical Bulletin:  MB 104  (2015)  CK3
Recommended:  CK3    [explanation]

This is 1 of 79 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 3 Oct 2015
Writeup from MB 104:

Northwest Africa 10276 (NWA 10276)

(Northwest Africa)

Purchased: 2014 Sep

Classification: Carbonaceous chondrite (CK3)

History: Purchased by Dr. David Gregory in September 2014 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, separated chondrules (apparent diameter up to 2.8 mm) containing Cr-magnetite plus fine-grained elongate CAI (up to 8 mm) are set in a dark matrix.

Geochemistry: Olivine (Fa0.8-29.8, N = 3), orthopyroxene (Fs4.0-24.4Wo0.8-0.9, N = 3), subcalcic augite (Fs1.8Wo27.9), augite (Fs1.6Wo41.5). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ17O -6.630, -2.962, -4.711; δ18O -3.265, 0.895, -1.277; Δ17O -4.906, -3.435, -4.037 per mil.

Classification: Carbonaceous chondrite (CK3).

Specimens: The entire specimen including a polished thin section is reposited at ROM.

Data from:
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2014 Sep
Mass (g):20.32
Shock stage:S2
Weathering grade:low
Fayalite (mol%):0.8-29.8
Ferrosilite (mol%):4.0-24.4
Wollastonite (mol%):0.8-0.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.32
Type spec location:ROM
Main mass:ROM
Comments:ROM 100; submitted by A. Irving
Plots: O isotopes:  
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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