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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:help 140 g
Classification
  history:
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 258 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 8 Jun 2021
Writeuphelp
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: Fs56.1±0.3Wo2.1±0.4 (Fs55.3-56.6Wo1.8-3.2, FeO/MnO=31-32, n=10); Ca-pyroxene: Fs23.2±0.7Wo44.6±0.7 (Fs22.2-24.2Wo43.4-45.6, FeO/MnO=27-30, n=9); calcic plagioclase: An89.7±0.6 (An88.7-90.7, 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8394 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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