Meteoritical Bulletin: Entry for Northwest Africa 14142

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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: 480 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 1 Aug 2021

Writeup

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 (Fs_59.8-60.8Wo_5.2-5.8, FeO/MnO = 30-31, N = 5), augite exsolution lamellae (Fs_28.4-29.4Wo_42.3-41.9, FeO/MnO = 30-35, N = 5), plagioclase (An_79.5-91.4Or_1.3-0.3, N = 4).

Classification: Eucrite (unbrecciated, ophitic).

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

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Agadir
Date:	P 2020 Jun
Mass (g):	480
Pieces:	1
Class:	Eucrite-unbr
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

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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

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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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