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Northwest Africa 10390
Basic information Name: Northwest Africa 10390
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10390
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 456 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 106 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Dec 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10390 (NWA 10390)

(Northwest Africa)

Purchased: 2015 Feb

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by Bob Falls in February 2015 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) The fresh specimen has a microgabbroic texture with minor cataclastic effects on grain boundaries, and consists predominantly of finely exsolved pigeonite and calcic plagioclase with accessory silica polymorph, ilmenite, troilite plus rare baddeleyite and Ni-free metal.

Geochemistry: Orthopyroxene host (Fs59.8Wo4.1, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs30.4Wo39.6, FeO/MnO = 31), discrete clinopyroxene (Fs33.5Wo35.9, FeO/MnO = 31).

Classification: Eucrite (unbrecciated, microgabbroic).

Specimens: 21.3 g including one polished thin section at UWB; main mass with Mr. R. Falls.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2015 Feb
Mass (g):455.8
Pieces:1
Class:Eucrite-unbr
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.8-60.2; 30.4-30.5
Wollastonite (mol%):4.1-3.9; 39.6-39.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.3
Type spec location:UWB
Main mass:R. Falls
Comments:BF15-3; 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. 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 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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