Meteoritical Bulletin: Entry for Northwest Africa 14028

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Northwest Africa 14028

Basic information

Name: Northwest Africa 14028
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14028
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 140 g

Classification
history:

Recommended:

Eucrite-mmict [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 8 Jun 2021

Writeup

Writeup from MB 110:

Northwest Africa 14028 (NWA 14028)

(Northwest Africa)

Purchased: 2020

Classification: HED achondrite (Eucrite, monomict)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in late 2020.

Physical characteristics: Light-brownish rock partly covered with fusion crust.

Petrography: The meteorite is a monomict basaltic breccia composed of coarse- and more fine-grained regions both dominated by exsolved pyroxene and often lath-shaped calcic plagioclase. Grain sizes are about 800 µm in the coarse-grained and about 250 µm in the fine-grained areas. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs_56.1±0.3Wo_2.1±0.4(Fs_55.3-56.6Wo_1.8-3.2, FeO/MnO=31-32, n=10); Ca-pyroxene: Fs_23.2±0.7Wo_44.6±0.7(Fs_22.2-24.2Wo_43.4-45.6, FeO/MnO=27-30, n=9); calcic plagioclase: An_89.7±0.6(An_88.7-90.7, n=11)

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P 2020
Mass (g):	140
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	56.1; 23.2
Wollastonite (mol%):	2.1; 44.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.7
Type spec location:	MNB
Main mass:	Andreas Schefzig
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

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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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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