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Northwest Africa 10853
Basic information Name: Northwest Africa 10853
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10853
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 109.3 g
Meteoritical Bulletin:  MB 105  (2016)  CM1
Recommended:  CM1    [explanation]

This is 1 of 28 approved meteorites classified as CM1.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 1), CM chondrites, and CM-CO clan chondrites
Comments: Approved 26 Nov 2016
Writeup from MB 105:

Northwest Africa 10853 (NWA 10853)

(Northwest Africa)

Purchased: 2016 July

Classification: Carbonaceous chondrite (CM1)

History: Purchased by Darryl Pitt in July 2016 from Aziz Habibi in Agadir, Morocco.

Physical characteristics: A single fragile, black stone (109.3 g) mostly covered by fusion crust.

Petrography: (A. Irving and S. Kuehner, UWS) Small (apparent diameter 200±150 μm), completely serpentinized chondrules plus tiny mineral grains occur in a very dark matrix. No olivine was found. Accessory minerals include pentlandite and Ni-bearing pyrrhotite.

Geochemistry: Serpentine (in wt.%) SiO2 38.5-38.6 , FeO 15.8-19.3, MnO 0.2, MgO 29.2-27.2, SUM 83.7-85.3, N = 2. Oxygen isotopes (K. Ziegler, UNM): analysis of a clean sample (unwashed, not pre-fluorinated) by laser fluorination gave, respectively, δ17O 5.286; δ18O 13.538; Δ17O -1.862 per mil.

Classification: Carbonaceous chondrite (CM1).

Specimens: 20.2 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2016 July
Mass (g):109.3
Shock stage:low
Weathering grade:low
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:DPitt
Comments:AH16-3; submitted by A. Irving
Plots: O isotopes:  
   and collections
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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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