Unnamed (north of South Fork of Otter Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities As
Other commodities Hg
Gangue minerals carbonate minerals; quartz

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale C-4
Latitude 62.52302
Longitude -157.63125
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,500 feet, north of the center of the South Fork of Otter Creek. The occurrence is about 0.3 mile west of hill 2039 in about the center of the north boundary of section 16, T. 28 N., R. 45 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence is an altered zone in an intermediate to mafic dike that cuts calcareous sandstone of the Upper Cretaceous Kuskokwim Group (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). The dike has been altered to silica-carbonate rock. One grab sample contained 470 parts per million (ppm) arsenic and 820 parts per billion (ppb) mercury (McGimsey and others, 1988).
Geologic map unit (-157.633636864854, 62.5223375445194)
Alteration of deposit Silica-carbonate alteration of mafic dike.

Production and reserves

Workings or exploration Surface samples were collected by the Alaska Division of Geological and Geophysical Surveys and the U.S. Geological Survey in 1986 (McGimsey and others, 1988).
Indication of production None