Unnamed (north of Mine Harbor)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Gangue minerals calcite

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale D-3
Latitude 55.786
Longitude -160.688
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on the Alaska Peninsula approximately 1 mile north of Mine Harbor on Herendeen Bay (MacKevett and Holloway, 1977, locality 23; Wilson and others, 1988, locality 23). The map site is at an elevation of 1,450 feet, in the NE1/4 of sec. 10, T. 51 S., R. 74 W., of the Seward Meridian. The location is accurate to within 1,200 feet.

Geologic setting

Geologic description

MacKevett and Holloway (1977) reported altered zones at this occurrence, probably related to Tertiary granitic rocks. No exposures of granite rocks were found in the area during U.S. Geological Survey studies in the mid-1980s (Wilson and others, 1988). Instead, these studies indicated extensive silicification and calcification of siltstone and sandstone of the Cretaceous Staniukovich Formation. A rock sample of olive-green siltstone was reported to be anomalous in copper and zinc (Wilson and others, 1987).
Geologic map unit (-160.690029596434, 55.7851761923228)
Age of mineralization Cretaceous or younger.

Production and reserves

Workings or exploration The U.S. Geological Survey mapped and sampled this occurrence in the mid-1980s. Sample 85AJm 765 was reported to be anomalous in copper and zinc (Wilson and others, 1987).
Indication of production None