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Northwest Africa 11701
Basic information Name: Northwest Africa 11701
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11701
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1016 g
Meteoritical Bulletin:  MB 107  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 382 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 27 Mar 2018
Writeup from MB 107:

Northwest Africa 11701 (NWA 11701)

(Northwest Africa)

Purchased: 2017 Sep

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Bob Falls in September 2017 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of intersertal to gabbroic eucrite clasts plus ~5 vol.% diogenitic orthopyroxene grains in a quench-textured melt matrix (partly vesicular with minor calcite infillings). Eucrite clasts consist of exsolved pigeonite and calcic plagioclase (polycrystalline) with accessory silica polymorph, ilmenite, fayalite, troilite, Ni-poor metal and zircon.

Geochemistry: Orthopyroxene host (Fs61.4-61.5Wo2.8-2.0, FeO/MnO = 32, N = 3), clinopyroxene exsolution lamellae (Fs27.0-27.3Wo43.4-41.4, FeO/MnO = 32-33, N = 2), diogenitic orthopyroxene (Fs30.8-32.6Wo5.4-3.1, FeO/MnO = 31-34, N = 2), fayalite (Fa84.5-85.6, FeO/MnO = 38, N = 2), plagioclase (An78.7-82.9Or1.3-0.6, N = 2).

Classification: Eucrite (melt-matrix polymict breccia).

Specimens: 25.8 g including one polished thin section at UWB; remainder with Mr. R. Falls.

Data from:
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2017 Sep
Mass (g):1015.8
Shock stage:high
Weathering grade:low
Fayalite (mol%):84.5-85.6
Ferrosilite (mol%):61.4-61.5
Wollastonite (mol%):2.8-2.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):25.8
Type spec location:UWB
Main mass:R. Falls
Comments:Work name BF17-20; 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)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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