Meteoritical Bulletin: Entry for Northwest Africa 15826

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Northwest Africa 15826

Basic information

Name: Northwest Africa 15826
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15826
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 50.9 g

Classification
history:

Meteoritical Bulletin:	MB 112	(2023)	CO3
Recommended:			CO3 [explanation]

This is 1 of 645 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 1 Apr 2023

Writeup

help

Writeup from MB 112:

Northwest Africa 15826 (NWA 15826)

(Northwest Africa)

Purchased: 2022 Sep

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Ziyao Wang in September 2022 from a dealer in Dchira, Morocco.

Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Well-defined small, unequilibrated chondrules (apparent diameter 170 ± 70 µm, N = 25) along with small amoeboid CAI and small mineral fragments are set in a fine grained matrix (~35 vol.%, black in thin section) containing Cr-poor magnetite, kamacite, taenite, troilite and pentlandite.

Geochemistry: Olivine (Fa_20.3±20.5, range Fa_1.4-53.3, N = 5; Cr₂O₃ in ferroan olivine 0.20-0.40 wt.%, mean 0.28 wt.%, sd 0.07 wt.%, N = 7), low-Ca pyroxene (Fs_1.3±0.3Wo_1.9±1.7, range Fs_1.0-1.6Wo_0.7-3.9, N = 3), augite (Fs_1.5±0.3Wo_37.3±2.8, range Fs_1.3-1.7Wo_39.3-35.3, N = 2), magnetite (Cr₂O₃ 0.01wt.%, 1.2 wt.%, N = 2).

Classification: Carbonaceous chondrite (CO3, magnetite-bearing).

Specimens: 11.3 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Dchira
Date:	P 2022 Sep
Mass (g):	50.9
Pieces:	1
Class:	CO3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	26.1±20.5
Ferrosilite (mol%):	1.3±0.3
Wollastonite (mol%):	1.9±1.7
Classifier:	(A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g):	11.3
Type spec location:	UWB
Main mass:	WangZ
Comments:	Work name WZY-128; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 112, in preparation (2023)

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Ziyao Wang

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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