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Resource Estimation And Simulation At West Butte In The Mcdonald Gold Deposit Near Lincoln, Montana, Jonathan Szarkowski
Resource Estimation And Simulation At West Butte In The Mcdonald Gold Deposit Near Lincoln, Montana, Jonathan Szarkowski
Graduate Theses & Non-Theses
The McDonald gold deposit is located in Lewis and Clark County near Lincoln, Montana and is divided into two regions: East Butte and West Butte. Approximately 90% of gold mineralization at McDonald is hosted by quartz-adularia-altered lithic tuff. Low-grade, stratabound, disseminated mineralization within permeable volcanic tuff is the dominant style of mineralization at McDonald. Higher-grade mineralization at West Butte is interpreted to be controlled by subvertical, intersecting vein systems that occur along the 9800’ E-W fault. Preliminary gold estimates at West Butte indicated the possibility of a 500 koz gold orebody at an average grade of 7.2 grams per ton …