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Northwest Africa 11698
Basic information Name: Northwest Africa 11698
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11698
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 832 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  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 27 Mar 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11698 (NWA 11698)

(Northwest Africa)

Purchased: 2017 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Bob Falls in February 2017 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Monomict breccia consisting of closely packed, subophitic eucrite clasts in a sparse matrix of related debris. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite and troilite.

Geochemistry: Orthopyroxene host (Fs60.8-62.5Wo3.6-1.8, FeO/MnO = 33-35, N = 3), clinopyroxene exsolution lamellae (Fs26.3-26.8Wo44.2-43.7, FeO/MnO = 33-35, N = 2), plagioclase (An84.5-84.6Or0.8-0.6, N = 2).

Classification: Eucrite (monomict breccia).

Specimens: 25.5 g including one polished thin section at UWB; remainder with Mr. R. Falls.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2017 Feb
Mass (g):832.4
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):60.8-62.5
Wollastonite (mol%):3.6-1.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):25.5
Type spec location:UWB
Main mass:R. Falls
Comments:Work name BF17-15; 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. 107, MAPS 55, 460-462
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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