Meteoritical Bulletin: Entry for Northwest Africa 13913

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Northwest Africa 13913

Basic information

Name: Northwest Africa 13913
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13913
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 42 g

Classification
history:

Recommended:

CK6 [explanation]

This is 1 of 73 approved meteorites classified as CK6. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 25 Apr 2021

Writeup

Writeup from MB 110:

Northwest Africa 13913 (NWA 13913)

(Northwest Africa)

Purchased: 2020 Nov

Classification: Carbonaceous chondrite (CK6)

History: Purchased by Shun-Chung Yang and Juan Chen in November 2020 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Largely recrystallized with some vague chondrule-like features. Composed predominantly of olivine and augite with subordinate Cr-magnetite, intermediate plagioclase., low-Ca pyroxene, troilite, pentlandite and Cr-Zn-bearing hercynitic spinel.

Geochemistry: Olivine (Fa_32.6±0.4, range Fa_31.9-32.9, N = 5), pigeonite (Fs_25.4Wo_7.4), augite (Fs_9.0±0.7Wo_46.5±0.5, range Fs_8.5-9.5Wo_46.1-46.8, N = 2), plagioclase (An_64.7Or_0.9), magnetite (Cr₂O₃ = 4.6-4.7 wt.%, N = 3).

Classification: Carbonaceous chondrite (CK6).

Specimens: 8.9 g in the form of a polished endcut at UWB; remainder with Mr. Shun-Chung Yang and Mr. Juan Chen.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Tindouf
Date:	P 2020 Nov
Mass (g):	42
Pieces:	1
Class:	CK6
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	32.6±0.4
Ferrosilite (mol%):	25.4; 9.0±0.7
Wollastonite (mol%):	7.4; 46.5±0.5
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	8.9
Type spec location:	UWB
Main mass:	S.-C. Yang/J. Chen
Comments:	Work name SCY-19; 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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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