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Northwest Africa 14994
Basic information Name: Northwest Africa 14994
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14994
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 120 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 379 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Jul 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14994 (NWA 14994)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Shun-Chung Yang in December 2021 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed of a variety of lithic eucrite clasts (with fine-intergranular, gabbroic and fine-equigranular textures) plus related crystalline debris and minor diogenitic orthopyroxene (<10 vol.%, exhibiting undulose extinction) within a fine grained matrix. Minerals are exsolved pigeonite, zoned pigeonite, calcic plagioclase, chromite, ilmenite, silica polymorph, troilite and Fe metal.

Geochemistry: Low-Ca pyroxene (Fs46.3-55.6Wo2.0-5.8, FeO/MnO = 32-39, N = 6), pigeonite (Fs47.5-52.9Wo15.6-8.5, FeO/MnO = 31-32, N = 7), diogenitic orthopyroxene (Fs31.8-32.3Wo3.0-2.5, FeO/MnO = 34, N = 2), plagioclase (An89.3-90.1Or0.4-0.8, N = 5).

Classification: Eucrite (polymict breccia).

Specimens: 22.0 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2019
Mass (g):120
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):46.3-55.6; 31.8-32.3; 47.5-52.9
Wollastonite (mol%):2.0-5.8; 3.0-2.5; 15.6-8.5
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):22.0
Type spec location:UWB
Main mass:S.-C. Yang
Comments:Work name SCY-5; 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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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