Dakavak Lake

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; As; Mo; Zn
Ore minerals gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MK
Quadrangle map, 1:63,360-scale A-3
Latitude 58.1658
Longitude -154.7255
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 2 miles north of the northern tip of Dakavak Lake in the SE1/4 sec. 19, T. 23 S., R. 33 W., of the Seward Meridian. Church, Riehle, and Goldfarb (1993) collected samples along a traverse about a mile long. The location is accurate.

Geologic setting

Geologic description

This occurrence is in hydrothermally altered, Upper Tertiary volcanic rocks, and consists of quartz veins with finely disseminated pyrite. The volcanic rocks are moderately to intensely altered to propylitic, argillic, phyllic, and potassic mineral assemblages. Church, Riehle, and Goldfarb (1993) collected samples along a traverse about a mile long. The samples contained up to 5 parts per million (ppm) gold, but most values are about 200 parts per billion. They also contain up to 10 ppm molybdenum, 0.5 ppm silver, 800 ppm arsenic, and 100 ppm zinc. The occurrence might reflect a concealed low-F, porphyry Mo type deposit. The occurrence is one of several similar sites along a northwest-striking, regional shear zone (Church, Riehle, and Goldfarb, 1993).
Geologic map unit (-154.727582590805, 58.1651079110246)
Mineral deposit model Polymetallic vein, epithermal gold vein (Cox and Singer, 1986; model 22c, 25).
Mineral deposit model number 22c, 25
Age of mineralization Late Tertiary or younger based on the age of the volcanic host rocks.
Alteration of deposit The volcanic rocks are moderately to intensely altered to propylitic, argillic, phyllic, and potassic mineral assemblages.

Production and reserves

Workings or exploration Apparently only sampling by government geologists.
Indication of production None

Additional comments

This occurrence is in the Katmai National Monument.

References