Estimation of Remaining Lode Gold Endowment in Selected Mining Districts of Alaska

摘要

Bureau of Mines estimated the remaining lode gold endowment of eight mining districts in Alaska using historic production data. A logarithmic model of cumulative tonnage of ore processed versus cumulative grade was applied to the following districts: Chichagof, Fairbanks, Home, Hope-Seward, Juneau, Ketchikan, Prince William Sound, and Willow Creek. To assess the remaining endowment, a computerized production data base was compiled from Bureau records. These data were aggregated in 5-yr intervals for each district. Data were sorted in order of decling grade, and log cumulative grade was plotted against log cumulative tonnage. A substantial total endowment of 8,415,100 tr oz of gold remains in the eight districts.