Meteoritical Bulletin: Entry for Northwest Africa 14182

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Northwest Africa 14182

Basic information

Name: Northwest Africa 14182
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14182
Observed fall: No
Year found: 2019
Country: Niger
Mass: 420 g

Classification
history:

Recommended:

LL4 [explanation]

This is 1 of 384 approved meteorites classified as LL4. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 20 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 14182 (NWA 14182)

Niger

Purchased: 2019 Sep

Classification: Ordinary chondrite (LL4)

History: Purchased by Mbark Arjdal in September 2019 from a dealer in Niger.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fairly closely packed, relatively large, well-formed equilibrated chondrules (some glass-bearing, some plagioclase-bearing) are set in a sparse matrix containing stained kamacite, taenite, troilite, pentlandite, low-Ti chromite and chlorapatite.

Geochemistry: Olivine (Fa_30.6±0.4, range Fa_29.9-30.9, N = 5), low-Ca pyroxene (Fs_24.7±0.3Wo_0.6±0.3, range Fs_24.3-24.9Wo_0.3-0.9, N = 3), pigeonite (Fs_23.4Wo_5.3; Fs_19.7Wo_15.9; N = 2), augite (Fs_9.2±1.8Wo_46.2±0.9, range Fs_7.9-10.4Wo_46.8-45.5, N = 2).

Classification: Ordinary chondrite (LL4).

Specimens: 45.4 g plus one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Niger
Date:	P 2019 Sep
Mass (g):	420
Pieces:	1
Class:	LL4
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	30.6±0.4
Ferrosilite (mol%):	24.7±0.3
Wollastonite (mol%):	0.6±0.3
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	45.4
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj ZM 650; 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)

Find references in NASA ADS:
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Geography:

Niger

Coordinates:

Unknown.

Statistics:
This is 1 of 93 approved meteorites from Niger (plus 4 unapproved names)

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