Meteoritical Bulletin: Entry for Northwest Africa 12626

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Northwest Africa 12626

Basic information

Name: Northwest Africa 12626
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12626
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 47 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	CO3
Recommended:			CO3 [explanation]

This is 1 of 566 approved meteorites (plus 1 unapproved name) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 11 Jun 2019

Writeup

Writeup from MB 108:

Northwest Africa 12626 (NWA 12626)

(Northwest Africa)

Purchased: 2018 Nov

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Craig Zlimen in November 2018 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Small, well-formed chondrules (apparent diameter 230±120 µm, N = 22), minerals fragments, AOA and very fine grained CAI are set in a fine grained matrix (~30 vol.%, orange-brown in thin section).

Geochemistry: Olivine (Fa_9.3±11.5(0.3-27.4), Cr₂O₃ in ferroan examples 0.04-0.08 wt.%, N = 5), orthopyroxene, Fs_2.1±2.7Wo_1.6±0.6(Fs_0.8-6.1Wo_1.1-2.3, N = 4), pigeonite (Fs_2.5Wo_5.3), subcalcic augite (Fs_1.2Wo_32.4), diopside (Fs_0.9Wo_40.9), hedenbergite (Fs_51.5Wo_46.4), plagioclase (An_66.7-73.8Or_0.8-0.2, N = 2).

Classification: Carbonaceous chondrite (CO3).

Specimens: 9.5 g including one polished thin section at UWB; remainder with Mr. C. Zlimen.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2018 Nov
Mass (g):	47
Pieces:	1
Class:	CO3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	0.3-27.4
Ferrosilite (mol%):	0.8-6.1
Wollastonite (mol%):	1.1-2.3
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	9.5
Type spec location:	UWB
Main mass:	C. Zlimen
Comments:	Work name ZLI08; 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7547 approved meteorites from (Northwest Africa) (plus 1970 unapproved names)

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