Report (English, PDF)

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Publisher-reported update

2026-08-26

In unconsolidated material, penetration rates for the all-terrain-vehicle (ATV) drill ranged from 3 ft/hr (0.9 m/hr) in frozen sandy pebble/cobble gravel to 33 ft/hr (10 m/hr) in unfrozen, loose muck. Drilling penetration was influenced by: 1) extent of freezing, 2) clast size, 3) distribution of clast size, and 4) degree of cohesiveness. Out of twenty-three holes, twelve reached bedrock and thirteen were gold-bearing. Maximum drill hole depth reached was 36 ft (11 m). Eleven holes were drilled adjacent to previously drilled larger diameter holes for gold value correlations. Six of these holes were known to be gold-bearing; our drilling indicated the presence of gold in five out of six holes. Small gold particles recovered from our drilling have a variety of shapes which range in size from 0.1 mm to 2 mm. The ATV drill rig field tested in this study met most of the objectives of this project but gave mixed results. The ATV drill rig: is limited to terrain of relatively smooth microtopography is helicopter transportable but requires a medium sized helicopter can penetrate most surficial materials found in typical Klondike placer deposits except for coarse gravels and some frozen…

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