El Cap Gold

Prospect, Active

Commodities and mineralogy

Main commodities Au
Other commodities Ag
Ore minerals gold
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale PE
Quadrangle map, 1:63,360-scale A-4
Latitude 56.13
Longitude -133.291
Nearby scientific data Find additional scientific data near this location
Location and accuracy The dump on this prospect is less than 100 feet from the shoreline on El Capitan passage, just north of the mouth of Tokhini Creek, northeast Kosciusko Island. Located to within 100 feet in section 23, T. 66 S., R. 78 E.

Geologic setting

Geologic description

A gold-quartz-calcite veins occurs along faults in Silurian greenschist the veins roughly parallel a limestone-greenschist contact to the southwest of the prospect (Brew, and others, 1984). Two steeply dipping veins are exposed, the longer of which extends for about 500 feet with a maximum thickness of about 3 feet (Maas, Bittenbender, and Still,1995). Visible gold is present in the veins but apparently there are few other ore minerals present. The gold values are erratic. Sampling showed gold values up to 2,027 ppm (59.0 ounces per ton) but most values were lower, and silver values only reached a maximum of 50.0 ppm.
Geologic map unit (-133.292720496847, 56.1296434146851)
Mineral deposit model Low-sulfide gold-quartz vein (Cox and Singer, 1986, model 36a)
Mineral deposit model number 36a
Age of mineralization Unknown.
Alteration of deposit None noted.

Production and reserves

Workings or exploration Mass, Bittenbender, and Still (1995) state that the deposit was originally found in 1962 but the claims allowed to lapse; the property was restaked in 1967. It has been active since. Property developed by eight trenches and a short adit. A mineral survey has been done on the property with intent to patent it. A map of the property is in Maas, Bittenbender, and Still (1995).
Indication of production None
Reserve estimates In view of the limited amount of data, reserve calculations were considered unwarranted by Maas, Bittenbender, and Still, (1995) who sampled the property.
Production notes Probably none.