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Northwest Africa 2628
Basic information Name: Northwest Africa 2628
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2628
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 248 g
Recommended:  CK3    [explanation]

This is 1 of 75 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 2 Aug 2020
Writeup from MB 109:

Northwest Africa 2628 (NWA 2628)

(Northwest Africa)

Purchased: 2004

Classification: Carbonaceous chondrite (CK3)

History: Purchased by Mike Farmer in 2004 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS; T. Bunch and J. Wittke, NAU; P. Carpenter, WUSL) Separated well-formed, granular unequilibrated chondrules (apparent diameter 980±280 µm, N = 20) containing more magnesian cores are set in a fresh matrix containing Cr-magnetite.

Geochemistry: Olivine (Fa20.3±13.3, range Fa0.3-33.2, N = 11), orthopyroxene (Fs13.8±11.4Wo1.0±0.1, range Fs0.9-22.5Wo1.0-0.9, N = 3), subcalcic augite (Fs1.0Wo33.9), diopside (Fs1.0Wo49.8), augite (Fs13.9Wo41.5), magnetite (0.6-2.9 wt.% Cr2O3, N = 3), plagioclase (An21.7Or3.1).

Classification: Carbonaceous chondrite (CK3).

Specimens: 26.2 g including one polished thin section at PSF; remainder with Mr. M. Farmer.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2004
Mass (g):248
Shock stage:S2
Weathering grade:low
Fayalite (mol%):20.3±13.3
Ferrosilite (mol%):13.8±11.4
Wollastonite (mol%):1.0±0.1
Classifier:A. Irving, S. Kuehner, T. Bunch, J. Wittke, P. Carpenter
Type spec mass (g):26.2
Type spec location:PSF
Main mass:M. Farmer
Comments:Submitted by A. Irving
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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