Meteoritical Bulletin: Entry for Northwest Africa 12443

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Northwest Africa 12443

Basic information

Name: Northwest Africa 12443
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12443
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 83 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	CV3
Recommended:			CV3 [explanation]

This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites

Comments:

Approved 27 Jul 2019

Writeup

Writeup from MB 108:

Northwest Africa 12443 (NWA 12443)

(Northwest Africa)

Purchased: 2018 Jul

Classification: Carbonaceous chondrite (CV3)

History: Found by Mohamed Zergou about 26 km E of Tantan on July 25, 2018, and purchased by Mbark Arjdal.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed granular chondrules (apparent diameter 940±480 µm, N = 23) plus amoeboid fine grained CAI (one composed of wollastonite+andradite+corundum) are set in a very fine-grained matrix (~40 volume%, black in thin section). XRD of a powdered sample show the absence of phyllosilicates.

Geochemistry: Olivine (Fa_26.6±25.5(range Fa_0.9-51.8), N = 3), enstatite (Fs_1.4±0.1Wo_2.3±2.1(range Fs_1.4-1.5Wo_0.8-3.8), N = 2), diopside (Fs_1.0Wo_37.8).

Classification: Carbonaceous chondrite (CV3).

Specimens: 16.9 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2018 Jul
Mass (g):	83
Pieces:	1
Class:	CV3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	26.6±25.5 (n=3)
Ferrosilite (mol%):	1.4±0.1 (n=2)
Wollastonite (mol%):	2.3±2.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	16.9
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj18-A3; 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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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