Meteoritical Bulletin: Entry for Northwest Africa 13956

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Northwest Africa 13956

Basic information

Name: Northwest Africa 13956
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13956
Observed fall: No
Year found: 2020
Country: Algeria
Mass: 98.4 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	CK5
Recommended:			CK5 [explanation]

This is 1 of 217 approved meteorites classified as CK5. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 29 May 2021

Writeup

Writeup from MB 110:

Northwest Africa 13956 (NWA 13956)

Algeria

Find: 2020

Classification: Carbonaceous chondrite (CK5)

History: Found in Algeria in 2020 and purhased by Ali Salamu in January 2021 from a dealer in Nouadhibou, Mauritania.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Sparse chondrules are present within a recrystallized matrix containing Cr-magnetite and sulfides (troilite and pentlandite, both partly altered to iron oxyhydroxides).

Geochemistry: Olivine (Fa_33.1±0.8, range Fa_32.7-34.5, N = 5), low-Ca pyroxene (Fs_28.4±0.3Wo_1.8±0.3, range Fs_28.2-28.7Wo_1.6-2.1, N = 3), augite (Fs_9.6±0.5Wo_46.4±0.4, range Fs_9.2-9.9Wo_46.1-46.7, N = 2), plagioclase (An_39.4Or_2.5; An_58.5Or_1.2; N = 2), magnetite (Cr₂O₃ = 4.7-5.0 wt.%, N = 3).

Classification: Carbonaceous chondrite (CK5).

Specimens: 24.4 g including one polished thin section at UWB; remainder with Mr. A. Salamu.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Nouadhibou
Date:	2020
Mass (g):	98.4
Pieces:	1
Class:	CK5
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	33.1±0.8
Ferrosilite (mol%):	28.4±0.3
Wollastonite (mol%):	1.8±0.3
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	24.4
Type spec location:	UWB
Main mass:	A. Salamu
Comments:	Work name SAL21-10; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

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:

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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