Unnamed Prospect (ARDF - MH160; northwest flank of Rainy Mountain); Copter lode, Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Unnamed Prospect (ARDF - MH160; northwest flank of Rainy Mountain); Copter lode	Lode
Delta River Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

Location: The approximate location of this prospect is at an elevation of 3,300 feet on the northwest flank of Rainy Mountain. It in the SE1/4SW1/4 section 8, T. 19 S., R. 10 E., Fairbanks Meridian. The location is within a mile of Cobb's locality 8 (1979 [OFR-79-238]) and locality S80 in table 2 of Nokleberg and others (1991). Martin (1920) described copper deposits 7 miles from Millers Roadhouse, and the Copter lode claims are also in the area (Brooks, 1918; Mulligan, 1974). No evidence of surface workings or mineralization was found at these claims in 1993 (W.T. Ellis, oral communication, 1996).
Geology: Chalcopyrite- and pyrrhotite-bearing diorite and altered limestone (skarn) reportedly were collect in this area by A.H. McNeer (Brooks, 1918). The Copter lode prospect consists of sparse chalcopyrite and pyrrhotite and minor gold in garnet-epidote-chlorite skarn hosted in limestone of the Eagle Creek Formation of Pennsylvanian age and in adjacent Triassic gabbro (Nokleberg and others, 1991).
Workings: Surface workings with 'considerable crosscutting' were reported by Martin (1920). The occurrence is on active claims of MAN Resources.
Age: Late Paleozoic or Triassic.
Alteration: A specimen from the prospect was an altered limestone skarn made up of garnet, epidote, and chlorite and disseminated sulfides.

Commodities (Major) - Cu; (Minor) - Au
Development Status: None
Deposit Model: Cu skarn (Cox and Singer, 1986; model 18b).

Other Databases

Link to USGS - Alaska:	MH160

Other Regions, Features and Areas containing this locality

References