Meteoritical Bulletin: Entry for Northwest Africa 13116

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Northwest Africa 13116

Basic information

Name: Northwest Africa 13116
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13116
Observed fall: No
Year found: 2019
Country: Mali
Mass: 15.4 kg

Classification
history:

Recommended:

H6 [explanation]

This is 1 of 6379 approved meteorites (plus 5 unapproved names) classified as H6. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 10 Jan 2020

Writeup

Writeup from MB 109:

Northwest Africa 13116 (NWA 13116)

Mali

Purchased: 2019 Aug

Classification: Ordinary chondrite (H6)

History: Purchased by Mbark Arjdal in August 2019 from a dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS & J. Boesenberg, BrownU) Mostly recrystallized with rare chondrule remnants, stained metal, sodic plagioclase, troilite, chromite and chlorapatite. The specimen is crosscut by some thin veinlets of secondary goethite and calcite.

Geochemistry: Olivine (Fa_19.7±0.2(range Fa_19.2-19.9, N = 6), low-Ca pyroxene (Fs_17.3±0.3Wo_1.4±0.2(range Fs_16.9-17.5Wo_1.2-1.6, N = 5), subcalcic augite (Fs_13.7Wo_20.3), augite (Fs_6.2Wo_45.0).

Classification: Ordinary chondrite (H6).

Specimens: 199 g including one polished thin section at UWB; main mass with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Timbuktu, Mali
Date:	P 2019 Aug
Mass (g):	15400
Pieces:	many
Class:	H6
Shock stage:	S2
Weathering grade:	W1/2
Fayalite (mol%):	19.7±0.2
Ferrosilite (mol%):	17.3±0.3
Wollastonite (mol%):	1.4±0.2
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	199
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj ZM 110; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Mali

Coordinates:

Unknown.

Statistics:
This is 1 of 69 approved meteorites from Mali (plus 1 unapproved name)

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