Unnamed (southest of upper Granite Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Bi; Cu
Other commodities Ag; As
Ore minerals iron oxide; pyrite

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale B-2
Latitude 62.34754
Longitude -156.94461
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,400 feet on a northeast-facing knob overlooking Granite Creek. It is about 0.9 mile north of hill 1620 and about 0.3 mile north-northeast of the center of section 18, T. 26 N., R. 41 W., Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence is a discontinuous gossan of iron oxides in an aureole of hornfelsed sandstone of the Upper Cretaceous, Kuskokwim Group (Bundtzen, Miller, and Laird, 1986; Miller and Bundtzen, 1994). Disseminated pyrite was noted. Small bodies of quartz monzonite cut the hornfels near the mineralized zone. No size or structural information is available. One grab sample contained 460 parts per million (ppm) arsenic, 500 ppm copper, 10.0 ppm bismuth, and 1,000 parts per billion silver (McGimsey and others, 1988).
Geologic map unit (-156.947003574107, 62.3468589723227)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c

Production and reserves

Workings or exploration Samples were collected by the U.S. Geological Survey and Alaska Division of Geological and Geophysical Surveys in 1984 (McGimsey and others, 1988).
Indication of production None

References