Unnamed (on hill 1012)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag
Other commodities Pb
Ore minerals iron oxide
Gangue minerals chalcedony

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale C-5
Latitude 62.6311
Longitude -158.4328
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on hill 1012 at the head of an unnamed tributary of the Yetna River. The occurrence is in the SE1/4, section 3, T. 29 N., R. 49 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of iron-oxide-stained, altered rhyolite tuff in the Upper Cretaceous to early Tertiary, Yetna River volcanic field (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). One grab sample contained 5.0 parts per million (ppm) silver and 200 ppm lead (McGimsey and others, 1988).
Geologic map unit (-158.435214559543, 62.6304263553003)
Age of mineralization Unknown; the Yetna River volcanic field is Late Cretaceous to Tertiary (58-68 Ma) in age (Miller and Bundtzen (1994).
Alteration of deposit Chalcedonic alteration.

Production and reserves

Workings or exploration Surface samples were collected by the U.S. Geological Survey in 1985 (McGimsey and others, 1988).
Indication of production None

Additional comments

Locality equivalent to number 69 of Miller, Bundtzen, and Gray (2005), Table 1.

References