NWA 11020 Eucrite Meteorite Part Slice weighing 0.66g

Northwest Africa 11020 (NWA 11020)

(Northwest Africa)

Purchased: 2016 Jun

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Fabien Kuntz in June 2016 from a dealer in Tan Tan, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of basaltic eucrite clasts in a sparse, dark matrix containing minor barite. The mostly rounded clasts consist of exsolved pigeonite (pale orange-brown in thin section) and polycrystalline calcic plagioclase with accessory silica polymorph, fayalitic olivine, Ti-chromite, ilmenite (containing rare inclusions of baddeleyite) and minor Fe-Mg-bearing merrillite.

Geochemistry: Orthopyroxene host (Fs_59.2Wo_3.9, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs_27.4Wo_42.9, FeO/MnO = 29), clinopyroxene host (Fs_29.1Wo_42.1, FeO/MnO = 30), orthopyroxene exsolution lamella (Fs_62.9Wo_2.3, FeO/MnO = 30), fayalitic olivine (Fa_83.9-86.0, FeO/MnO = 26-32), plagioclase (An_85.0-90.0Or_1.0-0.3, N = 2). Magnetic susceptibility log ? (× 10^-9 m³/kg) = 2.96.

Classification: Eucrite (monomict breccia, shocked).

Specimens: 24.54 g including one polished thin section at PSF; remainder with Kuntz.