Unnamed (near the head of Colorado Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Bi; Mn

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-6
Latitude 67.3613
Longitude -152.6539
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 3 miles east of the junction of Colorado and Mettenpherg Creeks. The occurrence is at an elevation of about 1,160 meters, about 0.3 mile north of the center of section 3, T. 29 N., R. 23 W., of the Fairbanks Meridian. The occurrence is the site of sample 228 in Dillon and others (1981 [AOF 133]). The location is accurate.

Geologic setting

Geologic description

This occurrence consists of mineralized, calcareous, biotite-quartz-chlorite-albite schist probably derived from intermediate meta-igneous rock (Dillon and others, 1981 [AOF 133B]). A grab sample contains 100 ppm silver, more than 20,000 ppm copper, 100 ppm bismuth, and 5,000 ppm manganese. No sulfides are noted in the sample description. The rocks in the area are Proterozoic(?) banded schist (Dillon and others, 1986). No other information is available.
Geologic map unit (-152.656658330762, 67.3608313661933)

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None