Unnamed (near the head of Portage Bay)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag

Geographic location

Quadrangle map, 1:250,000-scale CG
Quadrangle map, 1:63,360-scale A-3
Latitude 56.21
Longitude -158.61
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is located near the head of Portage Bay (MacKevett and Holloway, 1977, locality 5). Site location is accurate to within 2 miles.

Geologic setting

Geologic description

The area is underlain by volcanic rocks of the Meshik Formation of Oligocene and Eocene ages (Detterman and others, 1981). MacKevett and Holloway (1977) indicate alteration and porphyry type mineralization possibly associated with Tertiary intrusives.
Geologic map unit (-158.612029132066, 56.2092168268984)
Mineral deposit model Porphyry copper? (Cox and Singer, 1986; model 17).
Mineral deposit model number 17?
Age of mineralization Tertiary.

Production and reserves

Workings or exploration U.S. Bureau of Mines records indicate claims were staked on this occurrence in the mid-1960s.
Indication of production None

Additional comments

This site is located on land conveyed to or patented by the Bristol Bay Native Corporation.


MRDS Number 10307312


U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).
Reporters S.H. Pilcher (Anchorage)
Last report date 2/8/2000