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:

Recommended:

H4 [explanation]

This is 1 of 6459 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 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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