DAWSON CITY, Yukon - Atop a wooded peak in this land of mountains and deep valleys near the confluence of the White and Yukon rivers, a New Zealand-based miner is hard at work exploring for gold.

Underworld Resources Inc., a junior organized in 2007, has come to the Far North in hopes of making a commercial discovery at the White Gold and Black Fox Gold properties in west central Yukon Territor...