Meteoritical Bulletin: Entry for Northwest Africa 8039

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Northwest Africa 8039

Basic information

Name: Northwest Africa 8039
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8039
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 99 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	H3
Recommended:			H3 [explanation]

This is 1 of 710 approved meteorites (plus 2 unapproved names) classified as H3. [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 30 Dec 2013

Writeup

help

Writeup from MB 102:

Northwest Africa 8039 (NWA 8039)

(Northwest Africa)

Purchased: 2013

Classification: Ordinary chondrite (H3)

History: Purchased by Eric Twelker in 2013 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen composed of small (0.2-0.9 mm, some up to 1.7 mm), well-formed chondrules and some mineral fragments in a black, relatively metal-rich matrix. Olivine, orthopyroxene, subcalcic augite, diopside, sodic plagioclase, chromite, kamacite and troilite.

Geochemistry: Olivine (Fa_0.9-53.0; Cr₂O₃ in ferroan olivine 0.07-0.20 wt.%, mean 0.12±0.05 wt.%, N = 8), orthopyroxene (Fs_1.3-19.8Wo_0.9-2.7), subcalcic augite (Fs_7.4Wo_29.6), diopside (Fs_0.9Wo_47.1).

Classification: Ordinary chondrite (H3.4). Estimation of subtype based on histograms of Cr₂O₃ distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

Specimens: 19.9 g and one polished thin section are at UWB. The remainder is held by Twelker.

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2013
Mass (g):	99
Pieces:	40
Class:	H3
Shock stage:	S2
Weathering grade:	W0
Fayalite (mol%):	0.9-53.0 (n = 10)
Ferrosilite (mol%):	1.3-19.8
Wollastonite (mol%):	0.9-2.7
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	19.9
Type spec location:	UWB
Main mass:	E. Twelker
Comments:	ETNWA13-3; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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