Boulder Creek Prospect (Grouse Creek), Koyuk Mining District, Nome Census Area, Alaska, USAi

Regional Level Types
Boulder Creek Prospect (Grouse Creek)	Prospect
Koyuk Mining District	Mining District
Nome Census Area	Census Area
Alaska	State
USA	Country

Location: The original reference for this occurrence (West, 1953) describes it as on Grouse Creek whch is the same as Boulder Creek (BN089) on the current USGS topographic map of the area (Bendeleben A-1 quadrangle). The current topographic map shows Grouse Creek to be the northeast tributary to Boulder Creek and it was this location that was identified as locality 57 by Cobb (1972; MF 417; 1975; OFR 75-429). This prospect is here taken to be on Boulder Creek as shown on the current topographic map of the area. Boulder Creek is a small north tributary to the middle Tubutulik River.
Geology: West (1953) noticed the remains of old placer mine workings on this creek, as well as coal-bearing rocks in its headwaters, and collected a slightly radioactive heavy-mineral concentrate containing ilmenite, magnetite, garnet, and sphene. The Death Valley sandstone uranium deposit (BN089) is now known to be in the headwaters of this stream (Dickinson and others, 1987). The upper part of Boulder Creek approximately coincides with the contact between the Cretaceous Darby pluton to the west and early Eocene continental sediments and basalt to the east.
Workings: Surface placer mine workings have been noted here (West, 1948) but their success in recovering gold is uncertain.
Age: Quaternary

Commodities (Major) - Au ?, radioactive minerals
Development Status: Undetermined.
Deposit Model: Placer Au-PGE (Cox and Singer, 1986; model 39a)

Other Databases

Link to USGS - Alaska:	BN090

Other Regions, Features and Areas containing this locality

References