NWA 10869 (5,743 g)
Northwest Africa 10869 (NWA 10869)
Purchased: June 2016
Classification: HED achondrite (Eucrite, brecciated)
History: The meteorite was purchased in 2016 from a meteorite dealer at the mineral fair in St.Marie aux mines, France.
Physical characteristics: The individual lacks any fusion crust and shows a grayish interior.
Petrography: The meteorite is a breccia dominantly composed of coarse- and more fine-grained basaltic clasts and minor clastic matrix. Calcic plagioclase and exsolved pyroxenes are the dominant mineral phases and are up to 1 mm in size. Minor phases are FeS, chromite, ilmenite, SiO2 and metallic iron. The meteorite contains shock melt veins.
low-Ca pyroxene: Fs60.8±0.6Wo2.6±0.4 (Fs60.0-61.9Wo2.0-3.6, n=15, FeO/MnO=30-32);
Ca-pyroxene: Fs26.2±0.4Wo43.8±0.8 (Fs25.6-27.2Wo42.8-45.1, n=14, FeO/MnO=28-32);
calcic plagioclase: An89.0±1.7 (An85.8-93.8, n=15)
Place of purchase: St.Marie aux Mines, France
Date: P June 2016
Mass (g): 228
Shock stage: moderate
Weathering grade: low
Ferrosilite (mol%): 60.8; 26.2
Wollastonite (mol%): 2.6; 43.8
Classifier: A. Greshake, MNB
Type spec mass (g): 23.6
Type spec location: MNB
Main mass: Hanno Strufe
Comments: Submitted by Ansgar Greshake