Meteoritical Bulletin: Entry for Northwest Africa 14916

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Northwest Africa 14916

Basic information

Name: Northwest Africa 14916
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14916
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 520 g

Classification
history:

Recommended:

LL3 [explanation]

This is 1 of 414 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 9 May 2022

Writeup

Writeup from MB 111:

Northwest Africa 14916 (NWA 14916)

(Northwest Africa)

Purchased: 2021 May

Classification: Ordinary chondrite (LL3)

History: Purchased by Matthew Stream in May 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Closely-packed, well-formed, unequilibrated glass-bearing chondrules (apparent diameter 770 ± 320 µm, N = 26) are set in a sparse fine-grained matrix containing stained kamacite, taenite and troilite.

Geochemistry: Olivine (Fa_19.7±17.3, range Fa_0.4-47.5, N = 6; Cr₂O₃ in ferroan olivine 0.07-0.19 wt.%, mean 0.11 wt.%, sd 0.04 wt.%, N = 7), low-Ca pyroxene (Fs_10.7±5.2Wo_2.0±1.9, range Fs_4.0-16.1Wo_0.2-4.8, N = 5), pigeonite (Fs_12.9Wo_14.9), augite (Fs_4.1Wo_35.8; Fs_0.6Wo_48.0; N = 2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.24.

Classification: Ordinary chondrite (LL3).

Specimens: 22.52 g including one polished thin section at UWB; remainder with Mr. M. Stream.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021 May
Mass (g):	520
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W0/1
Fayalite (mol%):	19.7±17.3
Ferrosilite (mol%):	10.7±5.2
Wollastonite (mol%):	2.0±1.9
Magnetic suscept.:	4.24
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	22.52
Type spec location:	UWB
Main mass:	M. Stream
Comments:	Work name MS21-5; 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. 111, in preparation (2022)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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