Unnamed (near Harriman Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Pb
Ore minerals galena; gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-4
Latitude 60.9746
Longitude -148.4906
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located on the north side of Harriman Glacier at an elevation of about 1,500 feet. It is in the N1/2 section 12, T. 10 N., R. 5 E., of the Seward Meridian. This is location S-142 of Jansons and others (1984). This location is accurate to within half a mile.

Geologic setting

Geologic description

The occurrence is hosted in carbonaceous, pyritiferous slate and hematite-stained conglomerate (Hoekzema and Sherman, 1983) of the Valdez Group of Late Cretaceous age (Nelson and others, 1985). The deposit is in a shear zone and consists of pyrite- and galena-bearing quartz veins and stockwork veinlets. The largest vein examined strikes N55W and dips steeply southwest. The conglomerate locally contains clasts as much as 12 inches in diameter that are extremely fractured and healed with quartz veins. A single grab sample contained 0.03 ppm gold (Hoekzema and Sherman, 1983).
Geologic map unit (-148.492716774734, 60.9740266717483)
Mineral deposit model Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the vein is in a shear zone that cuts rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration The occurrence was discovered by the U.S. Bureau of Mines in 1981 (Hoekzema and Sherman, 1983). A single grab sample contained 0.03 ppm gold.
Indication of production None

References

References

Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
Reporters Jeff A. Huber (Anchorage)
Last report date 1/21/2000