Meteoritical Bulletin: Entry for Northwest Africa 14145

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Northwest Africa 14145

Basic information

Name: Northwest Africa 14145
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14145
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 170 g

Classification
history:

Recommended:

CK4 [explanation]

This is 1 of 121 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 31 Aug 2021

Writeup

Writeup from MB 110:

Northwest Africa 14145 (NWA 14145)

(Northwest Africa)

Purchased: 2020 Oct

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Luc Labenne in October 2020 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Separated well-formed, equilibrated magnetite-bearing chondrules are set in a fine grained matrix containing Cr-magnetite and intermediate plagioclase. Magnetite contains ilmenite exsolution lamellae and inclusions of pentlandite.

Geochemistry: Olivine (Fa_33.5±0.1, range Fa_33.4-33.6, N = 5), low-Ca pyroxene (Fs_28.3±1.4Wo_0.6±0.1, range Fs_26.8-29.5Wo_0.5-0.7, N = 3), augite (Fs_12.5±7.1Wo_48.8±0.8, range Fs_7.4-17.5Wo_48.2-49.3, N = 2), plagioclase (An_29.6-39.2Or_6.4-4.0, N = 2), magnetite (Cr₂O₃ 4.8-5.1 wt.%, N = 3).

Classification: Carbonaceous chondrite (CK4).

Specimens: 20.6 g including one polished thin section at UWB; remainder with Labenne.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2020 Oct
Mass (g):	170
Pieces:	1
Class:	CK4
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	33.5±0.1
Ferrosilite (mol%):	28.3±1.4
Wollastonite (mol%):	0.6±0.1
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	20.6
Type spec location:	UWB
Main mass:	Labenne
Comments:	Work name LAB21-11; submitted by A. Irving

Institutions
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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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