Unnamed (on Tributary Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale C-7
Latitude 60.7019
Longitude -149.5299
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,900 feet on upper Tributary Creek. It is in the NW1/4 section 18, T. 7 N., R. 1 W., of the Seward Meridian. This is location 26 of MacKevett and Holloway (1977), location 38 of Cobb and Tysdal (1980), and location S-274 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence consists of quartz veins that heal fractures in a felsic dike that cuts slate and sandstone of the Valdez Group of Late Cretaceous age (Tysdal, 1978 [MF-880-A]). The quartz contains little gold or other ore minerals.
Geologic map unit (-149.532047901574, 60.7013192737963)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the felsic dike cuts rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration No workings are reported. There are no data on possible gold content. The U.S. Bureau of Mines searched for the occurrence in 1979 but did not find it (Hoekzema and Sherman, 1983).
Indication of production None

References