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Northwest Africa 8774
Basic information Name: Northwest Africa 8774
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8774
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 42 g
Meteoritical Bulletin:  MB 106  (2018)  CO3
Recommended:  CO3    [explanation]

This is 1 of 621 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 14 Mar 2017
Writeup from MB 106:

Northwest Africa 8774 (NWA 8774)

(Northwest Africa)

Purchased: 2014 Oct

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Stefan Ralew in October 2014 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively small (average apparent diameter ~200 μm), round chondrules occur within a metal-bearing matrix (~15 vol.%). Main minerals are olivine and orthopyroxene, subordinate subcalcic augite and augite, plus accessory altered kamacite, taenite, troilite, merrillite and calcic plagioclase. Rare grains of Al-Ti-rich clinopyroxene are present in the matrix, and are associated with gehlenite, spinel and calcite.

Geochemistry: Olivine (Fa0.9-59.7, N = 3), orthopyroxene (Fs1.0-6.2Wo0.9-0.8, N = 3), subcalcic augite (Fs1.2Wo32.8), augite (Fs0.8Wo44.1).

Classification: Carbonaceous chondrite (CO3). This specimen is unusually metal-rich among CO chondrites.

Specimens: 8.5 g including one polished thin section at UWB; main mass with Ralew.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2014 Oct
Mass (g):42
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.9-59.7
Ferrosilite (mol%):1.0-6.2
Wollastonite (mol%):0.9-0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):8.5
Type spec location:UWB
Main mass:S. Ralew
Comments:RA10-3; submitted by A. Irving
   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)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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