Grogg Creek

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-1
Latitude 63.2058
Longitude -147.1131
Nearby scientific data Find additional scientific data near this location
Location and accuracy This gold placer prospect is along Gregg Creek, a tributary to upper Valdez Creek. The map site is near the head of Gregg Creek, in the S1/2 of sec. 2, T. 20 S., R. 3 E., of the Fairbanks Meridian. This location is accurate to with 200 feet.

Geologic setting

Geologic description

Grogg Creek drains an area underlain by pelitic schists and small intrusions of intermediate composition. The creel flows over glacio-fluvial gravels, but none of the workings has exposed the deeper gravels. Gold in small concentrations occurs throughout the extent of the creek and there have been many small-scale, hand-mining operations.
Geologic map unit (-147.115361088413, 63.205354745984)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Probably the same age as the White Creek gravels (HE205); ie., younger than the paleochannels on lower Valdez Creek (HE194).

Production and reserves

Workings or exploration There are many indications of small scale mining, both past and recent, on Grogg Creek. All operations appear to have been limited to near-surface gravels, and operations were apparently conducted without the benefit of any drilling (D.L. Stevens, personal observations).
Indication of production Yes; small