Geologic descriptionThe rocks in the area of this occurrence are andesitic tuffs and breccias of the Slana Spur Formation of Late Paleozoic age (Nokleberg and others, 1991). The occurrence is about one-quarter mile north of the Airstrip Fault that bounds the Slana Spur unit on the south (Rose, 1965, figure 2). The mineral deposit consists of sheared and silicified metavolcanic graywacke; grab sample 79IL027E assayed 2.3 parts per million (ppm) gold, 150 ppm silver, and 30 ppm molybdenum (Nokleberg and others, 1991, locality 54, table 2). |
Geologic map unit |
(-146.059163282221, 63.3218805644805) |
Mineral deposit model |
Low sulfide Au-quartz vein? (Cox and Singer, 1986; model 36a?). |
Mineral deposit model number |
36a? |
Age of mineralization |
Possibly mid-Cretaceous, related to faulting and regional metamorphism (Nokleberg and others, 1982). |
Alteration of deposit |
Silicification of the host rock. |