Sunshine Metals (ASX:SHN) is poking around the edges of a region of home to a historic copper-gold mine hoping to find untapped deposits. Focusing on two targets called Truncheon and Highway East respectively, geotechs are gearing up for a 9-hole 1.7km drill run using an RC rig. What they’re chasing after is a set of interesting areas highlighted in underground electromagnetic data scans pointing to possible mineralisation; the company reported on Friday assays are due back in early December. “We [have commenced] exploration drilling in the vicinity of the copper-gold rich Highway-Reward mine,…