NWA 11460 ( 8,506 g )

Northwest Africa 11460 (NWA 11460)
(Northwest Africa)
Purchased: 2017
Classification: Lunar meteorite
History: The meteorite was bought from a Moroccan meteorite dealer at the meteorite fair in Ensisheim, France.
Physical characteristics: Several small, grayish individuals without fusion crust but adhering reddish Sahara sand.
Petrography: The meteorite is a polymict breccia composed of lithic and mineral clasts consolidated in a mostly molten and recrystallized matrix. The up to 1 cm sized lithic clasts are dominantly basaltic and gabbroic, mineral clasts include up to 200 μm sized olivine, exsolved pyroxene, and feldspar grains. Accessories are Ti-chromite, ilmenite, FeNi metal, fayalite, and barite.
Geochemistry: olivine: Fa31.6±9.7 (Fa17.9-55.7, n=26, FeO/MnO=66-112); low-Ca pyroxene: Fs29.2±11.7Wo4.0±1.1 (Fs14.1-50.8Wo2.8-6.5, n=14, FeO/MnO=47-65); Ca-pyroxene: Fs25.1±9.6Wo34.1±7.4 (Fs12.7-44.4Wo23.1-42.6, n=17, FeO/MnO=34-67); calcic plagioclase: An96.7±0.8 (An94.6-97.8, n=15)
Classification: Lunar (feldspathic breccia)
 
Place of purchase:
Ensisheim, France
Date:
P 2017
Mass (g):
286
Pieces:
several
Class:
Lunar
Shock stage:
moderate
Weathering grade:
moderate
Fayalite (mol%):
31.6
Ferrosilite (mol%):
29.2; 25.1
Wollastonite (mol%):
4.0; 34.1
Classifier:
A. Greshake, MNB
Type spec mass (g):
21
Type spec location:
MNB
Main mass:
Philippe Schmitt-Kopplin
Comments:
Submitted by Ansgar Greshake