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Northwest Africa 8318
Basic information Name: Northwest Africa 8318
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8318
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 71 g
Meteoritical Bulletin:  MB 103  (2014)  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 6 Jun 2014
Writeup from MB 103:

Northwest Africa 8318 (NWA 8318)

(Northwest Africa)

Purchased: 2014 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Darryl Pitt from a Moroccan dealer in February 2014.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh monomict breccia composed of clasts of basaltic eucrite and related crystalline debris. A moderate degree of recrystallization is evident from the texture of the coarse grained matrix. Eucrite clasts consist of exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, Ti-rich chromite and troilite.

Geochemistry: Host orthopyroxene (Fs57.8-60.4Wo2.1-1.8; FeO/MnO = 32-33), clinopyroxene exsolution lamellae (Fs25.4-25.5Wo42.4-42.6; FeO/MnO = 30-31).

Classification: Eucrite, monomict.

Specimens: 14.2 g including one polished thin section at UWB. The remaining material is held by DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014 Feb
Mass (g):71
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):57.8-60.4; 25.4-25.5
Wollastonite (mol%):2.1-1.8; 42.4-42.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):14.2
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC0017; 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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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