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Northwest Africa 8021
Basic information Name: Northwest Africa 8021
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8021
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 185.6 g
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Nov 2013
Writeup from MB 102:

Northwest Africa 8021 (NWA 8021)

(Northwest Africa)

Purchased: 2013 Jul

Classification: HED achondrite (Eucrite)

History: Purchased by Aras Jonikas from a Moroccan dealer in July 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Monomict breccia composed of crystal debris and related small clasts with a gabbroic eucrite lithology. Predominantly exsolved pigeonite and shocked anorthitic plagioclase (characterized by very patchy, birefringent domains and some vesicles) plus accessory Ti-chromite, fayalitic olivine, rare taenite and regions with quench texture (composed of glassy and fine “herringbone” crystals). In thin section the pyroxene has a distinctive pale-brown color with fox-brown regions. Secondary (terrestrial) calcite and barite are present.

Geochemistry: Host orthopyroxene (Fs60.6-60.9Wo2.3-2.6; FeO/MnO = 28-30), clinopyroxene exsolution lamellae (Fs26.3-28.9Wo43.5-42.2; FeO/MnO = 26-28), plagioclase (An89.6-90.7Or0.4-0.5).

Classification: Eucrite (monomict, gabbroic).

Specimens: 27.5 g and one polished thin section are at UWB. The remainder is held by Mr. A. Jonikas.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Jul
Mass (g):185.6
Shock stage:high
Weathering grade:low/mod
Ferrosilite (mol%):60.6-60.9; 26.3-28.9
Wollastonite (mol%):2.3-2.6; 43.5-42.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):27.5
Type spec location:UWB
Main mass:A. Jonikas
Comments:AJ13-2; 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. 102, MAPS 50, 1662, September 2015
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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