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Northwest Africa 15137
Basic information Name: Northwest Africa 15137
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15137
Observed fall: No
Year found: 2022
Country: Niger
Mass:help 434 g
Classification
  history:
Recommended:  CK5    [explanation]

This is 1 of 209 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 19 Aug 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15137 (NWA 15137)

Niger

Purchased: 2022 Jan

Classification: Carbonaceous chondrite (CK5)

History: Found in Niger and purchased in January 2022 by Mbark Arjdal.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Sparse chondrules containing Cr-magnetite are present within a recrystallized matrix containing stained Cr-magnetite and intermediate plagioclase.

Geochemistry: Olivine (Fa27.1±1.0, range Fa25.6-28.7, N = 8), low-Ca pyroxene (Fs25.8±0.4Wo0.7±0.3, range Fs25.4-26.3Wo0.5-1.1, N = 4), pigeonite (Fs24.3Wo6.3), magnetite (Cr2O3 2.2-5.2 wt.%, N = 8).

Classification: Carbonaceous chondrite (CK5).

Specimens: 34.4 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Niger
Date:P 2022 Jan
Mass (g):434
Pieces:1
Class:CK5
Shock stage:S2
Weathering grade:low
Fayalite (mol%):27.1±1.0
Ferrosilite (mol%):25.8±0.4
Wollastonite (mol%):0.7±0.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):34.4
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj T1; 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 Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

Niger
Coordinates:Unknown.

Statistics:
     This is 1 of 117 approved meteorites from Niger (plus 4 unapproved names)

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