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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:help 770 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 342 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Sep 2013
Writeuphelp
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 (Fs21.5Wo2.4) to ferropigeonite (Fs59.8Wo19.0) to exsolved pigeonite composed of orthopyroxene host (Fs59.3-61.2Wo3.7-2.1) with clinopyroxene exolution lamellae (Fs26.7-26.8Wo43.4).

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:
CreditPhotos
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 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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