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Northwest Africa 14142
Basic information Name: Northwest Africa 14142
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14142
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 480 g
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 127 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Aug 2021
Writeup from MB 110:

Northwest Africa 14142 (NWA 14142)

(Northwest Africa)

Purchased: 2020 Jun

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased in Agadir, Morocco by Aziz Habibi in June 2020.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Ophitic texture. Composed predominantly of exsolved pigeonite grains (up to 2 mm) and smaller laths (up to 1 mm) of calcic plagioclase with accessory silica polymorph, ilmenite, Ti-Al chromite, troilite and rare zircon. Some veinlets of secondary calcite are present.

Geochemistry: Pigeonite host (Fs59.8-60.8Wo5.2-5.8, FeO/MnO = 30-31, N = 5), augite exsolution lamellae (Fs28.4-29.4Wo42.3-41.9, FeO/MnO = 30-35, N = 5), plagioclase (An79.5-91.4Or1.3-0.3, N = 4).

Classification: Eucrite (unbrecciated, ophitic).

Specimens: 20.7 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2020 Jun
Mass (g):480
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.8-60.8; 28.4-29.4
Wollastonite (mol%):5.2-5.8; 41.9-42.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.7
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 1021; 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)
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)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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