The Eagle mercury prospect is 0.5 kilometre north of the confluence of Shulaps Creek with the Yalakom River. The prospect is within green and purple greenstone and diorite-greenstone breccia assigned to the East Liza Igneous Complex which, in turn, is tentatively correlated with the Permian Bralorne Igneous Complex (Bralorne Intrusions).

The greenstone and diorite-greenstone breccia are commonly altered to ankerite, which forms irregular lenticular zones, laced with dolomite stringers. Cinnabar occurs as discrete grains and blebs in the dolomite veinlets or as short crosscutting hair-like stringers.

In 1968, 113 tonnes of ore were mined from which 172 kilograms of mercury were recovered. A 22-kilogram bulk sample collected in 1938 contained 0.44 per cent mercury and 14.74 grams per tonne silver. A floatation concentrate from this sample assayed 3.6 grams per tonne silver and 0.514 grams per tonne gold (Assessment Report 16280).

Ore reserves described as "reasonably assured" (measured geological) in 1971 totalled 641,773 tonnes grading 5.11 pounds per ton mercury. Drill indicated reserves are 976,039 tonnes grading 3.31 pounds per ton mercury (Statement of Material Facts July 27, 1971 - Condor Mining Ltd., E.P. Sheppard, January 22, 1971).