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Northwest Africa 8677
Basic information Name: Northwest Africa 8677
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8677
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 4.16 kg
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 508 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Dec 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8677 (NWA 8677)

(Northwest Africa)

Purchased: 2014 May

Classification: HED achondrite (Eucrite)

History: Purchased in Morocco by Ali and Mohammed Hmani in May 2014, and said to have been found near Foum El Hisn, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of clasts of recystallized basaltic eucrite (now overprinted by a granulitic texture) and subordinate clasts of gabbroic eucrite in a finer grained matrix of related debris. Both lithologies consist predominantly of compositionally-similar exsolved pigeonite and calcic plagioclase, with accessory silica polymorph, ilmenite and zircon. Plagioclase in the gabbroic clasts exhibits multi-domain structure and undulose extinction. A glassy shock vein was observed.

Geochemistry: Orthopyroxene host (Fs58.3-58.5Wo3.4-3.2, FeO/MnO = 31-32, N = 3), clinopyroxene exsolution lamellae (Fs25.3-25.4Wo44.2-44.3, FeO/MnO = 30-31, N = 3).

Classification: Eucrite (genomict, shocked).

Specimens: 21.7 g including one polished thick section at UWB. The remainder is held by Hmani.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014 May
Mass (g):4155
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):58.3-58.5; 25.3-25.4
Wollastonite (mol%):3.4-3.2; 44.2-44.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.7
Type spec location:UWB
Main mass:Hmani Inc.
Comments:OT16; 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)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
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 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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