Sweetcake Creek

Mine, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale SO
Quadrangle map, 1:63,360-scale D-4
Latitude 64.932
Longitude -163.741
Nearby scientific data Find additional scientific data near this location
Location and accuracy Sweetcake Creek is a north tributary to Ophir Creek (SO053). The mouth of Sweetcake Creek (not named on current USGS topographic maps) is about 0.8 miles upstream of the confluence of Ophir Creek and the Niukluk River. Placer mining took place in the lower mile of Sweetcake Creek at elevations of about 150 feet. This is locality 119 of Cobb (1972, MF 445; 1978, OF 78-181).

Geologic setting

Geologic description

The first placer mining in the Ophir Creek area occurred on Sweetcake Creek soon after gold was discovered here in 1898 (Collier and others, 1908). A stratigraphic section near the mouth of Sweetcake Creek included, from top to bottom: 5 feet of fine micaceous sand, 2 feet of gravel and sand, and 1 foot of angular schist, pay gravel on bedrock (Collier and others, 1908). The gravels of Sweetcake Creek contained abundant mineralized quartz and calcite fragments. It is reported that gold worth $36,000 (about 1,800 ounces) was recovered in 1898 from one claim (Collier and others, 1908) and total production from the creek is probably a few thousand ounces (Cobb, 1978, OF 78-181). The lower part of Sweetcake Creek crosses a low bench as it nears Ophir Creek but early mining was on a narrow pay streak along the active drainage. Bedrock in the area is part of a lower Paleozoic metasedimentary assemblage (Till and others, 1986).
Geologic map unit (-163.743617403295, 64.9312717868886)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Small-scale surface mining took place before WW I over the lower mile of the creek.
Indication of production Yes; small
Production notes It is reported that gold worth $36,000 (about 1,800 ounces) was recovered in 1898 from one claim (Collier and others, 1908) and total production from the creek is probably a few thousand ounces (Cobb, 1978, OF 78-181).

References