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Northwest Africa 8365
Basic information Name: Northwest Africa 8365
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8365
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 319 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 238 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 25 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8365 (NWA 8365)

(Northwest Africa)

Purchased: 2014 Mar

Classification: HED achondrite (Eucrite, monomict)

History: Purchased in March 2014 by John Higgins from a dealer in Agadir, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of clasts of gabbroic eucrite and related crystalline debris. Pale clove-brown exsolved pigeonite grains have wavy exsolution lamellae and calcic plagioclase is polycrystalline. Portions of the matrix are vesicular and consist mainly of very fine grained pigeonite and calcic plagioclase. Accessory minerals include silica polymorph, Ti-bearing chromite, ilmenite, troilite and secondary barite.

Geochemistry: Orthopyroxene host (Fs58.7-58.9Wo3.4-3.3, FeO/MnO = 31, N = 3), clinopyroxene exsolution lamellae (Fs26.6-27.6Wo42.3-41.4, FeO/MnO = 30-31, N = 3), matrix quench pigeonite (Fs61.7Wo17.3).

Classification: Eucrite (breccia, gabbroic). This specimen is likely paired with NWA 7989 and other such stones based on close similarities in lithology, shock and style of weathering.

Specimens: 23.5 g including one polished thin section at UWB. The remainder is held by J. Higgins.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2014 Mar
Mass (g):319
Pieces:1
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):58.7-58.9; 26.6-27.6
Wollastonite (mol%):3.4-3.3; 42.3-41.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):23.5
Type spec location:UWB
Main mass:J. Higgins
Comments:JH14-4; 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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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