Unnamed Occurrence (ARDF - GO005; between Togiak River and Ongivinuck River), Bristol Bay Region District, Dillingham Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - GO005; between Togiak River and Ongivinuck River)	- not defined -
Bristol Bay Region District	- not defined -
Dillingham Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is between the Togiak River and Ongivinuck River basins, about 8 km south of Togiak Lake. It is area 6 of Kilburn and others (1992) and is approximately located, perhaps within 1 or 2 miles. For this record, the map site is at an elevation of about 1,350 feet at the head of an unnamed creek, in the NW1/4 of section 34, T 8 S, R 61 W, of the Seward Meridian.
Geology: This occurrence is assumed to be within a Cretaceous or Tertiary granitic stock and surrounding hornfels that underlie this area (Hoare and Coonrad, 1978). Samples of diorite and hornfels contain up to greater than 10 ppm Hg (Coonrad and others, 1978). Quartz veinlets that occur within and parallel to an altered mafic dike that cuts diorite contain up to 0.23 ppm Ag, 0.25 ppm Au, 1.4 ppm Hg, and 60 ppm Sb (Kilburn and others, 1992); the host mafic dike contains 13.4 ppm Hg.
Workings: Reconnaissance geochemical rock sampling has been completed in the area.
Age: Probably Late Cretaceous or Early Tertiary. Mineralization may be related to the granitic pluton in the area, which is inferred to be part of a regionally extensive Upper Cretaceous and Lower Tertiary plutonic suite (Hoare and Coonrad, 1978).
Alteration: Silicification and oxidation.

Commodities (Major) - Au; (Minor) - Ag, As, Sb
Development Status: None
Deposit Model: Epithermal mercury

Other Databases

Link to USGS - Alaska:	GO005

Other Regions, Features and Areas containing this locality

References