Description
Northwest Africa 11209 (NWA 11209)
Mali
Purchased: 2015
Classification: HED achondrite (Eucrite, unbrecciated)
History: Purchased from El Moktar Ait Hiba at the 2015 Munich meteorite show.
Physical characteristics: A stone with fresh fusion crust. Broken surface reveals homogeneous grey interior.
Petrography: Igneous rock with ophitic texture. Low-Ca pyroxenes have augite exsolution. Average grain size 400 μm. Accessory silica polymorph, ilmenite, chromite. Rare metal.
Geochemistry: Low-Ca pyroxene Fs60.2±0.2Wo1.7±0.2, FeO/MnO=30.9±2.3 (N=5). Augite exsolution Fs30.5Wo38.1 (N=1). Plagioclase An79.2Ab17.7Or3.1 (N=4).
Classification: Eucrite, unbrecciated
Specimens: type specimen and polished sections at CEREGE. Main mass with Pierre-Marie Pelé.
