Unnamed (near Peak 6010)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Co
Ore minerals chalcopyrite; pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale D-5
Latitude 58.9641
Longitude -135.558
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 4,500 feet, 7.5 miles north of Mt. Young and about 9 miles west of Sullivan Island. It is approximately 0.4 mile north-northeast of peak 6010 in the SW1/4 section 34, T. 33 S., R. 59 E. of the Copper River Meridian. The location is accurate within 1/2 mile. It is just east of the boundary of Glacier Bay National Park and Reserve.

Geologic setting

Geologic description

The rocks in the area of this occurrence area are predominantly Silurian dark-gray, siliceous graywacke and argillite (Brew and Ford, 1985). Chalcopyrite, pyrite and pyrrhotite are disseminated in a siliceous greenschist (Wells and others, 1986). Cobalt was identified as a major trace constituent (Cobb,1978 [OFR-78-374]).
The area is underlain by deformed and metamorphosed Silurian or Devonian carbonate, clastic and volcanic clastic rocks that have been intruded by Upper Jurassic and Lower Cretaceous granitic and dioritic rocks (Brew and others, 1992).
Geologic map unit (-135.559852478219, 58.9637634485944)
Mineral deposit model Possibly a metamorphosed Kuroko massive sulfide deposit (Cox and Singer, 1986; model 28a) or a metamorphosed polymetallic replacement deposit (Cox and Singer, 1986; model 19a)
Mineral deposit model number 28a

Production and reserves

Indication of production None

References

MRDS Number A012105

References

Reporters J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date 12/15/2001