Northwest Africa 13064 (NWA 13064)
Classification: HED achondrite (Eucrite)
History: The meteorite was purchased from a meteorite dealer in Morocco.
Physical characteristics: Many greyish fragments without fusion crust.
Petrography: The meteorite is a fragmental breccia composed of larger exsolved pyroxene (up to 400 µm) and calcic plagioclase (up to 500 µm) grains set into a more fine-grained clastic matrix. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron has been detected. The meteorite contains shock melt veins.
Geochemistry: low-Ca pyroxene: Fs57.4±0.5Wo2.7±0.2 (Fs57.0-58.8Wo2.2-3.1, FeO/MnO=26-28, n=12); Ca-pyroxene: Fs25.2±0.7Wo43.3±0.7 (Fs24.4-27.3Wo41.1-44.0, FeO/MnO=24-28, n=15); calcic plagioclase: An90.9±0.4 (An90.2-91.6, n=14)
