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Northwest Africa 7167
Basic information Name: Northwest Africa 7167
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7167
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 144 g
Recommended:  CK4    [explanation]

This is 1 of 119 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 19 Jul 2020
Writeup from MB 109:

Northwest Africa 7167 (NWA 7167)

(Northwest Africa)

Purchased: 2011

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Marcin Cimała in 2011 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS; P. Carpenter, WUSL) Separated well-formed, equilibrated chondrules containing Cr-magnetite occur in a finer grained matrix (pale orange in thin section) containing intermediate plagioclase, stained Cr-magnetite, ferropseudobrookite and chlorapatite.

Geochemistry: Olivine (Fa33.4±0.3, range Fa32.9-33.7, N = 7), orthopyroxene (Fs27.3±0.3Wo1.4±0.1, range Fs27.1-27.6Wo1.5-1.4, N = 3), clinopyroxene (Fs8.6Wo47.4; Fs10.1Wo46.4; N = 2), magnetite (5.1-5.3 wt.% Cr2O3, N = 3), plagioclase (An28.3Or5.3; An43.2Or2.8; An58.1Or1.5; N = 3).

Classification: Carbonaceous chondrite (CK4).

Specimens: 21.4 g including one polished thin section at PSF; main mass with Mr. M. Cimała.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2011
Mass (g):144
Shock stage:S2
Weathering grade:low
Fayalite (mol%):33.4±0.3
Ferrosilite (mol%):27.3±0.3
Wollastonite (mol%):1.4±0.1
Classifier:A. Irving and S. Kuehner, UWS; P. Carpenter, WUSL
Type spec mass (g):21.4
Type spec location:PSF
Main mass:M. Cimala
Comments:Work name MC 094; submitted by A. Irving
   and collections
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 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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