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Northwest Africa 6912
Basic information Name: Northwest Africa 6912
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6912
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 27.6 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  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 29 Nov 2011
Writeuphelp
Writeup from MB 100:

Northwest Africa 6912 (NWA 6912)

Northwest Africa

Purchased: Feb 2011

Classification: HED achondrite (Eucrite, polymict)

Petrography: Fragmental breccia composed of clasts of fine-grained ophitic, cumulate and granulitic eucrites and related debris plus ~5 vol.% of diogenitic orthopyroxene containing inclusions of chromite. Eucritic minerals include exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite and troilite.

Geochemistry: Diogenitic orthopyroxene Fs24.0Wo2.4 FeO/MnO=27, host orthopyroxene Fs59.3-59.5Wo2.4, FeO/MnO=30, clinopyroxene exsolution lamellae Fs24.0-24.2Wo45.1-41.8, FeO/MnO=29.

Data from:
  MB100
  Table 1
  Line 1532:
Place of purchase:Tucson
Date:P Feb 2011
Mass (g):27.55
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):24.0; 59.3-59.5
Wollastonite (mol%):2.4; 2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):5.7
Type spec location:UWS
Main mass:MMartin
Comments:MM11-2; 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)
MMartin: P.O. Box 164, Kaaawa, HI 96730, United States; Website (private address; updated 14 Jul 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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