Meteoritical Bulletin: Entry for Northwest Africa 10839

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Northwest Africa 10839

Basic information

Name: Northwest Africa 10839
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10839
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 457 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	CK6
Recommended:			CK6 [explanation]

This is 1 of 81 approved meteorites classified as CK6. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 22 Oct 2016

Writeup

Writeup from MB 105:

Northwest Africa 10839 (NWA 10839)

(Northwest Africa)

Purchased: 2016 Jun

Classification: Carbonaceous chondrite (CK6)

History: Purchased by Aziz Habibi in June 2016 from a Mauritanian dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Sparse, separated chondrules occur within a recystallized matrix containing relatively abundant, orange-stained Cr-magnetite. Minor calcite veinlets are present.

Geochemistry: Olivine (Fa_27.8-28.3, N = 3), orthopyroxene (Fs_24.7-25.1Wo_0.6-0.9, Al₂O₃ = 5.1-5.8 wt.%, N = 3), clinopyroxene (Fs_12.0Wo_40.9; Fs_12.5Wo_48.3; N = 2).

Classification: Carbonaceous chondrite (anomalous CK6). The orthopyroxene in this specimen is unusually aluminum-rich (almost 6 wt.% Al₂O₃) compared with that in typical CK chondrites.

Specimens: 24.4 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P 2016 Jun
Mass (g):	457
Pieces:	1
Class:	CK6
Shock stage:	S2
Weathering grade:	moderate
Fayalite (mol%):	27.8-28.3
Ferrosilite (mol%):	24.7-25.1
Wollastonite (mol%):	0.6-0.9
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	24.4
Type spec location:	UWB
Main mass:	A. Habibi
Comments:	AH212; 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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Robert Smart
Ryan Upchurch

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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