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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:
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 409 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
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Revision
  history:
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