Unnamed (on Donaldson Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-7
Latitude 60.7687
Longitude -149.4948
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence on Donaldson Creek is at an elevation of 1,800 feet. It is in the SW1/4 section 20, T. 8 N., R. 1 W., of the Seward Meridian. The location is accurate to within a quarter of a mile. This is location 13 of Cobb and Richter (1972), location 12 of MacKevett and Holloway (1977), location 28 of Cobb and Tysdal (1980), and location S-277 of Jansons and others (1984).

Geologic setting

Geologic description

This occurrence consists of a slightly mineralized felsic dike that cuts slate and graywacke of the Valdez Group of Late Cretaceous age (Tuck ,1933; Nelson and others, 1985). The dike strikes N30E, dips vertically, and ranges in width from 8 to 10.5 feet. It is similar to, and could be a continuation of, the Gilpatrick dike (Martin and others, 1915). The highest gold assay value reported is $1.08 per ton (gold at $20.67 per ounce)(Johnson, 1915).
Geologic map unit (-149.496951659718, 60.7681211512953)
Mineral deposit model Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the felsic dikes cut rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration Martin and others (1915) reported open cuts showing sparse mineralization. The highest gold assay value reported is $1.08 per ton (gold at $20.67 per ounce).
Indication of production None