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Northwest Africa 12516
Basic information Name: Northwest Africa 12516
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12516
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 565 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  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 12 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12516 (NWA 12516)

(Northwest Africa)

Purchased: 2017 Mar

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Ben Hoefnagels in March 2017 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of microgabbroic eucrite clasts in a sparse matrix of related debris. Clasts consist of exsolved pigeonite (microgranular) and calcic plagioclase (polycrystalline) with accessory silica polymorph, ilmenite, Ti-bearing chromite, Ni-free metal, zircon and minor barite. The specimen is crosscut by some dark, very fine grained shock melt veinlets.

Geochemistry: Orthopyroxene host (Fs59.6-60.5Wo4.6-2.5, FeO/MnO = 33, N = 3), clinopyroxene exsolution lamellae (Fs26.7-27.0Wo42.7-43.1, FeO/MnO = 30-35, N = 2), plagioclase (An88.8-89.1Or0.2-0.4, N = 2).

Classification: Eucrite (monomict breccia, microgabbroic, shocked).

Specimens: 22 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2017 Mar
Mass (g):565
Pieces:2
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):59.6-60.5; 26.7-27.0
Wollastonite (mol%):4.6-2.5; 42.7-43.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:Work name BH068; 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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