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Northwest Africa 7145
Basic information Name: Northwest Africa 7145
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7145
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 66 g
Classification
  history:
Recommended:  CK4    [explanation]

This is 1 of 108 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
Writeuphelp
Writeup from MB 109:

Northwest Africa 7145 (NWA 7145)

(Northwest Africa)

Purchased: 2011

Classification: Carbonaceous chondrite (CK4)

History: Purchased in Temara, Morocco by Adam Aaronson in 2011.

Petrography: (A. Irving and S. Kuehner, UWS; T. Bunch and J. Wittke, NAU; P. Carpenter, WUSL) Separated well-formed, granular, equilibrated chondrules containing Cr-magnetite are set in a finer grained groundmass (pale orange in thin section) containing stained Cr-magnetite.

Geochemistry: Olivine (Fa31.4±0.2, range Fa31.2-31.6, N = 7), orthopyroxene (Fs26.0±0.1Wo1.0±0.1, range Fs26.0-26.2Wo0.8-1.1, N = 4), clinopyroxene (Fs6.8Wo49.3; Fs13.3Wo38.4; N = 2), magnetite (4.0-4.4 wt.% Cr2O3, N = 3), plagioclase (An47.8Or1.8).

Classification: Carbonaceous chondrite (CK4).

Specimens: 15.4 g including one polished thin section at PSF; remainder with Mr. A. Aaronson.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2011
Mass (g):66
Pieces:1
Class:CK4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):31.4±0.2
Ferrosilite (mol%):26.0±0.1
Wollastonite (mol%):1.0±0.1
Classifier:A. Irving, S. Kuehner, T. Bunch, J. Wittke, P. Carpenter
Type spec mass (g):15.4
Type spec location:PSF
Main mass:A. Aaronson
Comments:Work name M1313; submitted by A. Irving
Institutions
   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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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