Feasibility Study of Placer Gold Mining in the White Mountains Area, Circle and Tolovana Mining Districts, Alaska.
This report describes a placer mineral resource assessment and mining feasibility study for the White Mountains area north of Fairbanks, Alaska, in 1987. The mining feasibility study involved a cost analysis and cash flow determination for three types of placer mine models. The basic mine model design incorporated the use of dozers and loaders for material handling, vibrating screens and sluicing systems for ore processing, and gold saver type equipment for concentrate cleanup. Settling ponds were used in the mine design for effluent treatment. Data is presented graphically and in the form of third degree polynomial equations which can be used to estimate costs and cash flow for various configurations of ore reserves, mine design, and mining rate. The c-type mine, which incorporates the use of mining equipment which is owned outright by the mine operator has the greatest economic viability. The c-type mine model which is designed to operate at 1000 bcyd (bank cubic yards per day) for 6 years had the lowest breakeven rgv (recoverable gold value) threshold of $3.84/Yd3.