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Northwest Africa 10275
Basic information Name: Northwest Africa 10275
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10275
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 5.8 g
Meteoritical Bulletin:  MB 104  (2015)  CV3
Recommended:  CV3    [explanation]

This is 1 of 624 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 3 Oct 2015
Writeup from MB 104:

Northwest Africa 10275 (NWA 10275)

(Northwest Africa)

Purchased: 2014 Sep

Classification: Carbonaceous chondrite (CV3)

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 3.8 mm), some with multiple concentric dust rims, plus fine-grained CAI (up to 1.2 mm across) are set in a reddish-brown matrix (~40 vol.%).

Geochemistry: Olivine (Fa2.0-43.3, N = 3), orthopyroxene (Fs0.8-23.3Wo1.0-4.2, N = 3), clinopyroxene (Fs0.9-17.7Wo33.5-37.9, N = 2). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ17O -4.594, -8.405, -4.024; δ18O -0.493, -4.391, -0.001; Δ17O -4.334, -6.087, -4.023 per mil.

Classification: Carbonaceous chondrite (CV3).

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):5.75
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):2.0-43.3
Ferrosilite (mol%):0.8-23.3
Wollastonite (mol%):1.0-4.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):5.75
Type spec location:ROM
Main mass:ROM
Comments:ROM 099; 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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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