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Northwest Africa 10681
Basic information Name: Northwest Africa 10681
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10681
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 244 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 2 Jul 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10681 (NWA 10681)

(Northwest Africa)

Purchased: 2016 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Aras Jonikas in February 2016 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Monomict breccia consisting of closely packed, fine grained basaltic clasts in a sparse dark matrix. Minerals are exsolved pigeonite, calcic plagioclase, Ti-chromite, ilmenite, silica polymorph, plus secondary calcite and barite.

Geochemistry: Orthopyroxene host (Fs59.6-61.3Wo5.6-2.5.6, FeO/MnO = 30-31, N = 2), clinopyroxene exsolution lamella (Fs26.2Wo43.9, FeO/MnO = 29), clinopyroxene host (Fs26.4Wo43.9, FeO/MnO = 26).

Classification: Eucrite (monomict breccia)

Specimens: 20.0 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016 Feb
Mass (g):244
Pieces:2
Class:Eucrite-mmict
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):59.6-61.3; 26.2-26.4
Wollastonite (mol%):5.6-2.5.6; 43.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ16-3; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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