Meteoritical Bulletin: Entry for Northwest Africa 7167

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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: 144 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	CK4
Recommended:			CK4 [explanation]

This is 1 of 128 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

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 (Fa_33.4±0.3, range Fa_32.9-33.7, N = 7), orthopyroxene (Fs_27.3±0.3Wo_1.4±0.1, range Fs_27.1-27.6Wo_1.5-1.4, N = 3), clinopyroxene (Fs_8.6Wo_47.4; Fs_10.1Wo_46.4; N = 2), magnetite (5.1-5.3 wt.% Cr₂O₃, N = 3), plagioclase (An_28.3Or_5.3; An_43.2Or_2.8; An_58.1Or_1.5; 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:
  MB109
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2011
Mass (g):	144
Pieces:	1
Class:	CK4
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

Institutions
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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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