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Northwest Africa 10564
Basic information Name: Northwest Africa 10564
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10564
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 1000 g
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Mar 2016
Writeup from MB 105:

Northwest Africa 10564 (NWA 10564)

(Northwest Africa)

Purchased: 2015 Dec

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Darryl Pitt in December 2015 from a dealer in Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Matrix-poor breccia consisting mainly of closely packed, relatively fine-grained subophitic eucrite clasts. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, Ti-chromite, ilmenite and troilite. Minor secondary calcite is present.

Geochemistry: Orthopyroxene host (Fs62.6-63.6Wo2.6-2.5, FeO/MnO = 31, N = 3), clinopyroxene exsolution lamellae (Fs26.8-27.8Wo43.9-43.1, FeO/MnO = 30-33, N = 3), fayalite (Fa80.2, FeO/MnO = 43).

Classification: Eucrite (monomict breccia).

Specimens: 21.2 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2015 Dec
Mass (g):999.5
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):80.2
Ferrosilite (mol%):62.6-63.6; 26.8-27.8
Wollastonite (mol%):2.6-2.5; 43.9-43.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.2
Type spec location:UWB
Main mass:D. Pitt
Comments:MCVICH 17/26; submitted by A. Irving
   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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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