Meteoritical Bulletin: Entry for Northwest Africa 12444

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Northwest Africa 12444

Basic information

Name: Northwest Africa 12444
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12444
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 115 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	LL3
Recommended:			LL3 [explanation]

This is 1 of 452 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 27 Jul 2019

Writeup

Writeup from MB 108:

Northwest Africa 12444 (NWA 12444)

(Northwest Africa)

Purchased: 2018 Jul

Classification: Ordinary chondrite (LL3)

History: Purchased by Ben Hoefnagels in July 2018 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Closely packed, well formed, relatively large chondrules (apparent diameter 790±420 µm, N = 14) are set in a fine grained metal-poor matrix.

Geochemistry: Olivine (Fa_16.9±11.4(range Fa_0.7-95.6); Cr₂O₃ in ferroan examples 0.07-0.15 wt.%, mean 0.11±0.03 wt.%, N = 10), low-Ca pyroxene (Fs_19.3±18.7Wo_0.7±0.3(range Fs_2.0-39.1Wo_0.4-0.8), N = 3). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 3.95.

Classification: Ordinary chondrite (LL3).

Specimens: 27.6 g including one polished endcut at UWB; remainder with B. Hoefnagels.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2018 Jul
Mass (g):	115
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	16.9±11.4 (n=10)
Ferrosilite (mol%):	19.3±18.7 (n=3)
Wollastonite (mol%):	0.7±0.3
Magnetic suscept.:	3.95
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	27.6
Type spec location:	UWB
Main mass:	B. Hoefnagels
Comments:	Work name BH158; 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Photos:

Credit	Photos
Public domain photographs:
A. Irving

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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