Meteoritical Bulletin: Entry for Northwest Africa 15306

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Northwest Africa 15306

Basic information

Name: Northwest Africa 15306
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15306
Observed fall: No
Year found: 2021
Country: Niger
Mass: 2.98 kg

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	H4
Recommended:			H4 [explanation]

This is 1 of 6493 approved meteorites (plus 2 unapproved names) classified as H4. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 1 Oct 2022

Writeup

Writeup from MB 111:

Northwest Africa 15306 (NWA 15306)

Niger

Purchased: 2021 Dec

Classification: Ordinary chondrite (H4)

History: Found in Niger and purchased in December 2021 by Mbark Arjdal.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed chondrules are set in a relatively coarse grained matrix conatining stained kamacite, taenite, troilite and merrillite, but no plagioclase.

Geochemistry: Olivine (Fa_17.9±0.2, range Fa_17.6-18.1, N = 5), low-Ca pyroxene (Fs_16.0±0.7Wo_1.1±0.3, range Fs_15.5-17.3Wo_0.6-1.5, N = 5), augite (Fs_6.2±0.4Wo_45.0±0.7, range Fs_6.0-6.7Wo_44.4-45.8, N = 3).

Classification: Ordinary chondrite (H4).

Specimens: 42.1 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 2021 Dec
Mass (g):	2982
Pieces:	6
Class:	H4
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	17.9±0.2
Ferrosilite (mol%):	16.0±0.7
Wollastonite (mol%):	1.1±0.3
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	42.1
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj TN2; 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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Geography:

Niger

Coordinates:

Unknown.

Statistics:
This is 1 of 119 approved meteorites from Niger (plus 4 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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