Description
On offer: a fragment.
Dimensions: ~3 x 2 mm
What you get: this fragment, a plastic box with label at the back, a signed Certificate of Authenticity.
Type: Unbrecciated eucrite
Country: Sahara
Date of find: 2015
Total mass: 50.2 g
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.
