Unnamed (adjacent to Cantwell Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Mn
Ore minerals rhodochrosite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale B-4
Latitude 63.387
Longitude -148.934
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect adjoins the northwest side of Cantwell Creek approximately 1,000 feet upstream from its junction with the Jack River and about 0.6 mile southeast of Cantwell. The site is in sec. 5, T. 18 S., R. 7 W., of the Fairbanks Meridian. The location is accurate to within 1500 feet. This is location 7 of Clark and Cobb (1972).

Geologic setting

Geologic description

The host rocks are a melange of Paleozoic and upper Mesozoic sedimentary rocks. An 8-foot-wide outcrop contains crushed and partially recrystallized rhodochrosite; other manganese minerals are present, but not identified. The deposit is probably localized along strands of the McKinley fault.
Geologic map unit (-148.936282988245, 63.386538282748)
Mineral deposit model Epithermal Mn (Cox and Singer, 1986; model 25g)
Mineral deposit model number 25g
Age of mineralization Post-Mesozoic.

Production and reserves

Workings or exploration Surface samples contain as much as 33.35% manganese (Berg and Cobb, 1967).
Indication of production None

References