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:

Recommended:

CK5 [explanation]

This is 1 of 199 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 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

Find references in NASA ADS:
Find references in Google Scholar:

Geography:

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1250 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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