Meteoritical Bulletin: Entry for Northwest Africa 6577

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Northwest Africa 6577

Basic information

Name: Northwest Africa 6577
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6577
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 770 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 395 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 6 Sep 2013

Writeup

Writeup from MB 102:

Northwest Africa 6577 (NWA 6577)

(Northwest Africa)

Purchased: 2011 Jan

Classification: HED achondrite (Eucrite, polymict)

Petrography: (A. Irving and S. Kuehner, UWS) Polymict breccia composed of lithic and mineral fragments derived mostly from basaltic and cumulate eucritic lithologies, plus sparse (<10 vol%) diogenitic orthopyroxene.

Geochemistry: Pyroxenes range from diogenitic (Fs_21.5Wo_2.4) to ferropigeonite (Fs_59.8Wo_19.0) to exsolved pigeonite composed of orthopyroxene host (Fs_59.3-61.2Wo_3.7-2.1) with clinopyroxene exolution lamellae (Fs_26.7-26.8Wo_43.4).

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2011 Jan
Mass (g):	770
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	low
Weathering grade:	low
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21.3
Type spec location:	UWB
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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

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

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Andreas Grünemeyer
Michael S. Scherman

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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