Meteoritical Bulletin: Entry for Northwest Africa 6929

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Northwest Africa 6929

Basic information

Name: Northwest Africa 6929
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6929
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 165 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	H4
Recommended:			H4 [explanation]

This is 1 of 6493 approved meteorites (plus 2 unapproved names) classified as H4. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 6 Oct 2011

Writeup

Writeup from MB 100:

Northwest Africa 6929 (NWA 6929)

Northwest Africa

Purchased: 2011 Mar

Classification: Ordinary chondrite (H4)

Petrography: Mostly small, well-formed and fairly closely packed chondrules in a stained metal-rich matrix. Minerals include olivine, orthopyroxene, subcalcic augite, augite, altered kamacite (with minor associated barite), chromite, merrillite and troilite. Isolated grains identified in the matrix are aluminous enstatite (Fs_0.8Wo_4.0; Al₂O₃ 1.1 wt.%, FeO/MnO = 8.2) and a single 0.4 mm, rounded grain of pink Cr-pleonaste spinel.

Geochemistry: Olivine Fa_17.2, orthopyroxene Fs_14.2-14.4Wo_0.5, subcalcic augite Fs_8.1Wo_35.3, augite Fs_8.8Wo_44.1, aluminous enstatite Fs_0.8Wo_4.0; Al₂O₃ 1.1 wt.%, FeO/MnO = 8.2.

Data from:
  MB100
  Table 1
  Line 1545:

Place of purchase:	Morocco
Date:	P 2011 Mar
Mass (g):	165
Pieces:	4
Class:	H4
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	17.2
Ferrosilite (mol%):	14.2-14.4
Wollastonite (mol%):	0.5
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21
Type spec location:	UWS
Main mass:	G. Fujihara
Comments:	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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Geography:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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