NWA 14059 (2,059 g)

Northwest Africa 14059 (NWA 14059)
(Northwest Africa)
Purchased: 2019
Classification: HED achondrite (Eucrite)
History: The meteorite was purchased from a meteorite dealer at the mineral show in Munich, Germany.
Physical characteristics: Grayish fragment partly covered with fusion crust.
Petrography: Unbrecciated gabbroic eucrite composed of exsolved pyroxene and often lath-shaped calcic plagioclase up to 1 mm in size. Some pyroxenes show compositional zoning attesting to a low degree of thermal metamorphism. Minor phases include silica, chromite, ilmenite, fayalite, FeS, and secondary barite. No metallic iron has been detected.
Geochemistry: zoned pyroxene: Fs47.0±9.0Wo8.3±1.7 (Fs36.0-59.3Wo5.4-10.6, FeO/MnO=26-30, n=11); low-Ca pyroxene host to augite exsolution lamellae: Fs62.0±0.8Wo4.7±0.9 (Fs60.7-63.2Wo3.1-6.2, FeO/MnO=25-27, n=10); Ca-pyroxene exsolution lamellae: Fs30.9±0.5Wo42.4±0.5 (Fs30.0-32.3Wo41.3-43.0, FeO/MnO=27-32, n=11); calcic plagioclase: An81.9±1.6 (An79.9-84.8, n=11)
 
Place of purchase:
Munich, Germany
Date:
P 2019
Mass (g):
18.5
Pieces:
1
Class:
Eucrite
Shock stage:
low
Weathering grade:
moderate
Ferrosilite (mol%):
47.0; 62.0; 30.9
Wollastonite (mol%):
8.3; 4.7; 42.4
Classifier:
A. Greshake, MNB
Type spec mass (g):
3.7
Type spec location:
MNB
Main mass:
Philippe Schmitt-Kopplin
Comments:
Submitted by Ansgar Greshake