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Northwest Africa 8663
Basic information Name: Northwest Africa 8663
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8663
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 49 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 344 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Feb 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8663 (NWA 8663)

(Northwest Africa)

Purchased: Oct 2014

Classification: HED achondrite (Eucrite, polymict)

Petrography: (P. Warren, UCLA) This eucrite is a fine-grained polymict breccia with a minor (slightly less than 10%, based on the fusion crust composition) diogenite component. Minor Fe-metal.

Geochemistry: Pyroxene ranges from diogenitic (En67Wo3) to ferroan-eucritic (En38Wo2). Averages: low-Ca pyroxene En50.0±13.1Wo2.5±1.1, FeO/MnO wt ratio 30.5±2.7, n=10; high-Ca pyroxene En31.4±1.2Wo42.8±1.0, n=5; plagioclase An89.5±3.0, n=5. The fusion crust has 18.4 wt% FeO, 9.8 wt% MgO and 11.1 wt.% Al2O3, indicating the diogenite component is slightly less than the howardite threshold of 10 w.t%.

Classification: Eucrite (polymict).

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Oct 2014
Mass (g):49
Pieces:15
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):47.5
Wollastonite (mol%):2.5
Classifier:P. Warren, UCLA
Type spec mass (g):10.2
Type spec location:UCLA
Main mass:Larry Atkins
Comments:Submitted by P. Warren
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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