The Esperon 11 showing is located 25 kilometres northwest of Kelowna, near the headwaters of Sandberg Creek.
In this area, Eocene quartz monzonite intrudes argillaceous and calcareous sediments of the Devonian to Triassic Harper Ranch Group. The stock is cut by plugs and dikes of diorite which are intruded by quartz monzonite and aplite dikes. The intrusive rocks are cut by Tertiary basalt dikes related to overlying volcanic rocks.
Harper Ranch Group limestone hosts trace amounts of molybdenite and pyrite.
In 1979-80, Cominco Ltd. carried out geological mapping, induced polarization and magnetometer surveys.