1. Institute of Northern Engineering, University of Alaska Fairbanks, Duck 403, 1760 Tanana Loop, Fairbanks, Alaska 99775, United States
2. Mineral Industry Research Laboratory, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States
3. Nevada Gold Mines, Barrick Gold Corporation, Elko, Nevada 89801, United States
4. Department of Civil and Environmental Engineering, University of Alaska Fairbanks, ELIF 360, 1764 Tanana Loop, Fairbanks, Alaska 99775, United States