Shovel Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale SH
Quadrangle map, 1:63,360-scale B-4
Latitude 66.3784
Longitude -157.8479
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Shovel Creek placer mine is at an elevation of about 1,200 feet on this northwest-flowing tributary of Ingruksukruk Creek. The coordinates are for the mine symbol on Shungnak B-4 topographic map. The map site is in section 9, T. 11 N., R. 5 E., of the Kateel River Meridian. Cobb (1972, MF-448), location 17.

Geologic setting

Geologic description

Shovel Creek heads in the Upper Cretaceous Purcell Mountain quartz monzonite pluton, and crosses a contact between Jurassic-Lower Cretaceous andesitic volcanic rocks and the quartz monzonite. No large zones of altered rock were observed in the area, but abundant cobbles of black tourmaline and of albitized quartz monzonite containing tourmaline veinlets occur in the placer tailings and stream gravels. The quartz monzonite appears to be altered adjacent to the veinlets. Analyses of two tourmaline-rich cobbles show 700 and 1,000 ppm copper but no detectable gold. Indications are that the placer gold may have come from the quartz-tourmaline veins (Miller and Ferrians, 1968).
Geologic map unit (-157.850590954278, 66.3778146387735)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.
Alteration of deposit Albitization of quartz monzonite adjacent to tourmaline veinlets.

Production and reserves

Workings or exploration The creek has been placer mined on a small scale. The site was examined and some rock samples collected by the U.S. Geological Survey during the 1960s. One hundred lode claims were staked in the vicinity in 1972 (Grybeck, 1977).
Indication of production Yes; small

Additional comments

Stream gradient approximately 250-300 feet per mile.

References

MRDS Number A015604

References

Reporters Anita Williams (Anchorage, AK)
Last report date 12/16/1999