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Northwest Africa 14966
Basic information Name: Northwest Africa 14966
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14966
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 150 g
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 119 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14966 (NWA 14966)

(Northwest Africa)

Purchased: 2021 Dec

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by Eric Twelker in December 2021 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Although this specimen retains its original gabbroic texture (apparent mean grainsize ~1.5 mm), both the constituent pigeonite and anorthite have been thoroughly transformed into vesicular, ultra-fine grained polycrystalline aggregates. Accessory phases include ferroan subcalcic augite, ballen silica polymorph (exhibiting a "crackled" texture), medium-Ti chromite and ilmenite.

Geochemistry: Pigeonite (Fs36.9-46.7Wo7.3-16.0, FeO/MnO = 28-33, N = 5), ferroan subcalcic augite (Fs66.0Wo22.4, FeO/MnO = 37), anorthite (An91.9±0.0Or0.3, N = 3).

Classification: Eucrite (unbrecciated, gabbroic, shock-melted).

Specimens: 21.9 g including one a polished slice plus polished thin section at UWB; remainder with Twelker.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2021 Dec
Mass (g):150
Pieces:8
Class:Eucrite-unbr
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):36.9-46.7; 66.0
Wollastonite (mol%):7.3-16.0; 22.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.9
Type spec location:UWB
Main mass:Twelker
Comments:Work name ET21-9; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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