Blue Lode

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals azurite; bornite; chalcopyrite; malachite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale B-5
Latitude 62.3422
Longitude -149.0506
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Blue Lode prospect is at an elevation of about 4,200 feet on the south, valley wall of the Middle Fork, Iron Creek, 0.6 mile northeast of the top of hill 5066. The prospect is in the NE1/4SE1/4 sec. 15, T. 26 N., R. 2 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 73 of Csejtey and Miller (1978).

Geologic setting

Geologic description

The Blue Lode prospect consists of chalcopyrite and bornite disseminated in Triassic, Nikolai Greenstone(?) (Schmidt and others, 2002). Outcrops on a cliff show conspicuous malachite and azurite staining. A 2-foot-wide shear zone strikes N16E and dips steeply to the west; it contains some chalcopyrite-bearing quartz (Capps, 1919 [B 692]). Samples collected by the U.S. Bureau of Mines contain up to 70,000 parts per million copper and 44 parts per million silver (Fechner, 1986).
Geologic map unit (-149.0528212787, 62.3417050983198)
Mineral deposit model Basaltic Cu (Cox and Singer, 1986; model 23)
Mineral deposit model number 23
Age of mineralization Occurs in Triassic Nikolai Greenstone.
Alteration of deposit Oxidation of copper minerals.

Production and reserves

Workings or exploration Workings consist of an open cut. Samples collected by the U.S. Bureau of Mines contain up to 70,000 parts per million copper and 44 parts per million silver (Fechner, 1986). As of January 1, 2000, Cominco held a block of approximately 25 state claims covering this and adjacent prospects (Northern Associates Inc., written communication, 2001).
Indication of production None

Additional comments

MAS/MILS number 20760011.

References

MRDS Number A012174

References

Reporters R.K. Rogers (U. S. Geological Survey contractor)
Last report date 10/1/2002