Unnamed (on Placer Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Pb; Zn
Ore minerals chalcopyrite; galena; gold; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale A-8
Latitude 60.2491
Longitude -149.7375
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence consists of several mineralized zones near the head of Placer Creek where it drains Lowell Glacier and at an elevation of 1,500 feet. This occurrence is in the E1/2 section 23, T. 2 N., R. 3W., of the Seward Meridian. This is location S-207 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The Placer Creek occurrence consists of quartz veins containing massive sulfide pods interbedded with siltstone and calcareous sandstones (Hoekzema and Sherman, 1983). Sulfide minerals include galena, sphalerite, and chalcopyrite. Nelson and others (1985) mapped the bedrock in this area as sedimentary rock of the Valdez Group of Late Cretaceous age.
A single grab sample assayed 0.56 ounce of gold per ton, 11.34 ounces of silver per ton, 1.25 percent copper, 1.75 percent zinc, and 2.6 percent lead (Jansons and others, 1984). No further information is published.
Geologic map unit (-149.739626863976, 60.2485073674378)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration A single grab sample assayed 0.56 ounce of gold per ton, 11.34 ounces of silver per ton, 1.25 percent copper, 1.75 percent zinc, and 2.6 percent lead (Jansons and others, 1984). No further information is published.
Indication of production None

Additional comments

The occurrence is located in the Kenai National Moose Range and is closed to mineral entry.

References