Cape Kubugakli Lode

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Cu; Mo; Pb; Sb
Ore minerals galena; gold; magnetite; molybdenite; pyrite; stibnite; tetrahedrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale KR
Quadrangle map, 1:63,360-scale D-4
Latitude 57.9
Longitude -155.1
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is located at the eastern end of Cape Kubugakli and encompasses an area of several square miles (Berg and Cobb, 1967, figure 4, locality 16; Cobb, 1972, MF 459, locality 2; MacKevett and Holloway 1977, locality 2; Church and others, 1989, MF 1539 I, locality 9).

Geologic setting

Geologic description

Quartz stringers 1/2-inch or less thick are present in some felsic dikes and quartz diorite plugs of Miocene age, and in some of the sedimentary rocks cut by the intrusives. The stringers carry minor amounts of galena, gold, magnetite, molybdenite, pyrite, stibnite, and tetrahedrite. Bedrock consists of sedimentary units of the Shelikof formation of Jurassic age. Sericitic and propylitic alteration and silicification have been mapped over an area of several square miles and includes the mineralized rocks.
Silt samples collected within this area may exhibit anomalous amounts of molybdenum, whereas panned concentrates may show anomalous antimony, boron, copper, gold, and silver (Church and others, 1989, MF 1539 I, Bulletin 1858). Gold, chalcopyrite, pyrite scheelite, and tourmaline have been noted in the concentrates. Mineralized rock samples may be anomalous in copper, gold, molybdenum, silver, and zinc.
Geologic map unit (-155.102093234518, 57.8992999028649)
Mineral deposit model Porphyry Cu, porphyry Cu-Mo, polymetallic vein (Cox and Singer; model 17, 21a, 22c).
Mineral deposit model number 17, 21a, 22c
Age of mineralization Miocene or younger
Alteration of deposit Sericitic and propylitic alteration and silicification have been mapped over an area of several square miles.

Production and reserves

Indication of production None

Additional comments

Site is located in Katmai National Park.


MRDS Number A012460


Reporters S.H. Pilcher (Anchorage)
Last report date 8/18/1998