Meteoritical Bulletin: Entry for Northwest Africa 6723

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Northwest Africa 6723

Basic information

Name: Northwest Africa 6723
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6723
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 141.8 g

Classification
history:

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

This is 1 of 451 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 31 Jan 2012

Writeup

Writeup from MB 100:

Northwest Africa 6723 (NWA 6723)

(Northwest Africa)

Purchased: Feb 2011

Classification: HED achondrite (Howardite)

Petrography: Relatively fresh fragmental breccia composed mostly of basaltic eucritic clasts and related debris with ~15 vol.% diogenitic orthopyroxene; one quenched eucrite clast was noted. Eucritic minerals include orthopyroxene, subcalcic augite, calcic plagioclase, ilmenite, chromite, Ni-free metal, troilite, silica polymorph and rare zircon (associated with ilmenite). Metal in the matrix and within some basaltic eucrite clasts exhibits minor hydroxide staining from terrestrial weathering.

Geochemistry: Diogenitic orthopyroxene Fs_31.2Wo_5.0; Fe/Mn=27), orthopyroxene Fs_57.9Wo_4.2(Fe/Mn=30), subcalcic augite Fs_37.3-45.9Wo_29.2-27.3(Fe/Mn=27-30).

Data from:
  MB100
  Table 1
  Line 1497:

Place of purchase:	Marrakech
Date:	P Feb 2011
Mass (g):	141.8
Pieces:	3
Class:	Howardite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	57.9; 37.3-45.9
Wollastonite (mol%):	4.2; 29.2-27.3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.7
Type spec location:	UWS
Main mass:	B. Booz
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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Photos:

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

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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