Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Ore minerals arsenopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale KD
Quadrangle map, 1:63,360-scale D-2
Latitude 57.883
Longitude -152.635
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on the west coast of Larsen Island in sec. 35, T. 26 S., R. 21 W., of the Seward Meridian (Rose and Richter, 1967, locality 7). Site location is accurate to within several hundred feet.

Geologic setting

Geologic description

At this locality Tertiary granodiorite along a beach is cut by iron-stained quartz veins for several hundred feet. The veins average N. 75 W. in strike and contain pyrite and pyrrhotite in local abundance. Some of the veins are vuggy. A sample collected here by Rose and Richter, 1967, assayed 0.10 ounce per ton gold, 3.50 ounces per ton silver, trace copper, and 14 percent arsenic.
Geologic map unit (-152.637193222775, 57.8822640626075)
Mineral deposit model Chugach-type low-sulfide gold-quartz veins (Bliss, 1992; model 36a.1).
Mineral deposit model number 36a.1
Age of mineralization Tertiary

Production and reserves

Workings or exploration One sample assayed 0.28 ounce per ton gold, 3.50 ounces per ton silver, 14 percent arsenic, and trace copper.
Indication of production None

Additional comments

Site is on land conveyed to the Koniag Corporation.