Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; marcasite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BS
Quadrangle map, 1:63,360-scale D-7
Latitude 59.895
Longitude -149.281
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located on the Resurrection Peninsula about 1.7 miles north of Cape Resurrection on the southwest flank of Hill 2077. The main showing is about three quarters of a mile east of the shore along a cliff in the NE1/4 of section 28, T. 3 S., R. 1 E., of the Seward Meridian. At the base of the cliff, there is a 8 to 10 feet thick breccia zone that strikes N78E and dips vertically. Higher up and about 300 feet to the east another similar zone (possibly the same one faulted a little to the north) is 8 to 10 feet thick. This is location 6 of Cobb and Tysdal (1980) and location 109 in Tysdal (1978). This location is accurate within a quarter of a mile.

Geologic setting

Geologic description

Tysdal and Case (1979) described the bedrock geology in this area as Cretaceous, pale to dark green, aphanitic to porphyritic pillow basalt with subordinate pillow breccia, tuff, and siltstone.
The mineralization is hosted in a breccia that is fractured and recemented with quartz and sulfides. The breccia cement is soft and weathers to a gossan, although the sulfides are not evenly distributed through the cement. One zone 6 foot wide is particularly rich in sulfides. A sample of this material assayed 9.8 percent copper (Martin and others, 1915).
Geologic map unit (-149.283127676194, 59.8944417236519)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a).
Mineral deposit model number 24a
Age of mineralization Cretaceous.
Alteration of deposit Cement in breccia is iron stained and weathered to gossan.

Production and reserves

Workings or exploration One short, 10 foot adit was driven prior to 1918. The adit was driven in a 6 foot wide breccia zone where the cement was rich in sulfides. A sample of this richly mineralized zone assayed 9.8 percent Cu (Martin and others, 1915).
Indication of production None