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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:help 98.4 g
Classification
  history:
Recommended:  CK5    [explanation]

This is 1 of 182 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
Writeuphelp
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 (Fa33.1±0.8, range Fa32.7-34.5, N = 5), low-Ca pyroxene (Fs28.4±0.3Wo1.8±0.3, range Fs28.2-28.7Wo1.6-2.1, N = 3), augite (Fs9.6±0.5Wo46.4±0.4, range Fs9.2-9.9Wo46.1-46.7, N = 2), plagioclase (An39.4Or2.5; An58.5Or1.2; 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1140 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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