Unnamed (northwest slope of Big Mountain)

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale IL
Quadrangle map, 1:63,360-scale B-6
Latitude 59.4063
Longitude -155.2343
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is about 1.25 miles north-northwest of the peak of Big Mountain (VABM 2161). The prospect is at an elevation of about 650 feet in the SE1/4 sec. 7, T. 9 S., R. 35 W., Seward Meridian. The location is accurate within about 1 mile, and corresponds to locality 29 of MacKevett and Holloway (1977).

Geologic setting

Geologic description

Big Mountain is composed of Tertiary basalt and andesite flows, tuff, and volcanic rubble and breccia (Detterman and Reed, 1980). Near the prospect, the rocks are cut by faults that strike northeast. Lode claims were staked at this site before 1973 (U.S. Bureau of Mines, 1973). The limited information available suggests that the Tertiary volcanic rocks are cut by gold-bearing quartz(?) veins (MacKevett and Holloway, 1977).
Geologic map unit (-155.236457127389, 59.4056034820675)
Mineral deposit model Epithermal low-sulfide gold-quartz veins? (Cox and Singer, 1986, model 36a?).
Mineral deposit model number 36a?
Age of mineralization Tertiary.

Production and reserves

Workings or exploration Claims were located during or before 1973 (U.S. Bureau of Mines, 1973). No substantial work has been done at the site.
Indication of production None



U.S. Bureau of Mines, 1973, Iliamna, Alaska quadrangle maps showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, scale 1:250,000.
Reporters C.C. Hawley, Hawley Resource Group, Anchorage, Alaska
Last report date 6/8/2003