Cache Creek - South

Occurrence, Inactive

Commodities and mineralogy

Main commodities Zn
Ore minerals sphalerite
Gangue minerals dolomite

Geographic location

Quadrangle map, 1:250,000-scale MD
Quadrangle map, 1:63,360-scale C-3
Latitude 63.558
Longitude -154.096
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Cache Creek South occurrence is located at approximately 2,400 feet (732 m) in elevation at the head of Cache Creek, a tributary to the South Fork of White Mountain Creek in Section 30, T. 22 S., R. 25 E., of the Kateel River Meridian. Location is known to within 100 feet (30 m).

Geologic setting

Geologic description

Intense zinc-bearing solution breccia zone hosted in Paradise Fork Formation of Dutro and Patton (1982), which is also unit 'Sic' of Andrews and Rishel (1982). The zone appears to be about 10 feet (3 m) thick, and can be traced for about 200 feet (61 m) along a strike direction of N 55 E. Mineralization difficult to recognize due to the elusive color (pale tan) of sphalerite. Host rock is inferred to be Silurian based on age of the 'Sic' unit (Patton and others 1980; Blodgett, 1982). Four surface grab samples ranged from 0.64 percent to 6.40 percent zinc and averaged 2.20 percent zinc, with no appreciable lead (Andrews and Rishel, 1982).
Geologic map unit (-154.098341344992, 63.5574122781921)
Mineral deposit model Southeast Missouri Pb-Zn (Cox and Singer, 1986; model 32a) or Mississippi Valley type (Cox and Singer, 1986; model 32b).
Mineral deposit model number 32a or 32b
Age of mineralization The host rock is probably Silurian based on age of the Sic unit (Blodgett, 1982). The age of the mineralization is unknown.
Alteration of deposit Recrystallized dolomite.

Production and reserves

Workings or exploration The Cache-Creek-South was discovered in the late 1970s during regional exploration conducted by WGM Inc. on lands selected by Doyon Ltd. Four surface grab samples contained 0.64 percent to 6.40 percent zinc and averaged 2.20 percent zinc, with no appreciable lead (Andrews and Rishel, 1982).
Indication of production None
Reserve estimates None.

Additional comments

See: Reef Ridge (MD055) and Cache Creek North (MD037) Mississippi Valley Type showings. The Cache Creek - South occurrence is on lands selected or owned by Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.


MRDS Number 10307787


Andrews, Tom, and Rishel, John, 1982, Annual Report for 1981, Reef Ridge I-to-XIII Project Areas, Kuskokwim Block, Alaska: Anchorage, Alaska, WGM Inc., Project Report 4, 45 p., 2 sheets, scales 1:63,360 and 1:20,000. (Report held by Doyon, Limited, Fairbanks, Alaska.)
Blodgett, R.B., 1982, Stratigraphy of Reef Ridge project area; WGM Inc., Anchorage, Alaska, Reef Ridge Project area, Block 10, Doyon region: WGM Inc., 34 pages.
Reporters Bundtzen, T.K. (Pacific Rim Geological Consulting)
Last report date 6/2/1998