Ihly

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Pb
Ore minerals chalcopyrite; galena; pyrargyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale C-6
Latitude 62.7228
Longitude -149.5415
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Ihly prospect is at an elevation of about 3,400 feet on El Dorado Creek, an informally named, south tributary to Gold Creek. It is 0.9 mile north of the top of hill 3645, about 0.6 mile northeast of the center of sec. 1, T. 30 N., R. 2 W., Seward Meridian. The location is accurate to within 1/4 mile This is locality 31 of Csejtey and Miller (1978).

Geologic setting

Geologic description

The Ihly prospect consists of near-vertical, north-striking felsic dikes that cut Jurassic or Cretaceous flysch; the dikes are cut by mineralized quartz veins (Kurtak and others, 1992). One dike is 5 feet wide and conformable to bedding, which strikes N 2 0E and dips steeply to the northwest. Another dike is 7 feet wide, strikes north and dips steeply east. Fractures in the dikes vary from 0.5 inch to 8 inches wide and are filled with quartz with galena, pyrite, pyrargyrite, and chalcopyrite. Rock samples collected by the State of Alaska contain up to 0.5 ounce of silver per ton and 0.49 percent lead. In 1952, the claim owners reported assays of 0.02 to 0.06 ounce of gold per ton and 0.28 to 1.98 ounces of silver per ton (Kurtak and others, 1992).
The mineralization was reportedly discovered in 1950 (Berg and Cobb, 1967). The lode claims were initially staked over the prospect by R. Pankey and J. Callahan. As of January 1, 2000, 2 state prospecting sites covered this prospect (Northern Associates Inc., written communication, 2001).
Geologic map unit (-149.543760907081, 62.7223122924483)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c?)
Mineral deposit model number 22c?
Alteration of deposit The dike rock is described as altered but the type of alteration is not specified (Berg and Cobb, 1967).

Production and reserves

Workings or exploration The mineralization was reportedly discovered in 1950 (Berg and Cobb, 1967). The lode claims were initially staked over the prospect by R. Pankey and J. Callahan. As of January 1, 2000, 2 state prospecting sites covered this prospect (Northern Associates Inc., written communication, 2001). Rock samples collected by the State of Alaska (Kurtak and others, 1992). In 1952, the claim owners reported assays of 0.02 to 0.06 ounce of gold per ton and 0.28 to 1.98 ounces of silver per ton.
Indication of production None

Additional comments

MAS/MILS number 20760001.

References

MRDS Number A012198

References

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