Bermuda

Prospect, Inactive

Commodities and mineralogy

Main commodities Zn
Other commodities Pb
Ore minerals smithsonite
Gangue minerals dolomite; secondary carbonates

Geographic location

Quadrangle map, 1:250,000-scale MD
Quadrangle map, 1:63,360-scale B-3
Latitude 63.461
Longitude -154.065
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Bermuda prospect is located on a southwest spur at 2,000 feet (610 m) in elevation near the head of Beaver Creek, in the extreme southwest corner of Section 28, T. 23 S., R. 25 E., of the Kateel River Meridian. Location is known to within 100 feet (30 m).

Geologic setting

Geologic description

At the Bermuda prospect, iron-rich smithsonite gossan is hosted in recrystallized dolomite, which is considered to be the same northeast striking, mineralized dolomite layer as at the Big Gate (MD050) and Beaver (MD048) zinc occurrences. Host unit is probably equivalent to the Paradise Fork Formation of Dutro and Patton (1982); unit OSbd of Andrews and Rishel (1982). Host rock is inferred to be mid-Paleozoic based on fossil collections (Dutro and Patton, 1982). The age of mineralization is unknown. Composite grab samples in main spur area contained an average of 0.67 percent zinc and 0.035 percent lead. Further to the northeast, float found in stream cut along strike contained 17.00 percent zinc and 0.23 percent lead (Andrews and Rishel, 1982).
Geologic map unit (-154.067330003226, 63.4604109528639)
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 Host rock is inferred to be Paleozoic based on fossil collections (Dutro and Patton, 1982). The age of the mineralization is unknown.
Alteration of deposit Secondary dolomite.

Production and reserves

Workings or exploration The Bermuda prospect was found by WGM Inc. and Patino Ltd. in the late 1970s during exploration for base metals on lands selected by Doyon Ltd (Andrews and Rishel, 1982) Composite grab samples in main spur area contained an average of 0.67 percent zinc and 0.035 percent lead. Further to the northeast, float found in stream cut along strike contained 17.00 percent zinc and 0.23 percent lead (Andrews and Rishel, 1982).
Indication of production None
Reserve estimates None.

Additional comments

See also Beaver (MD048), Hillside (MD049) and Big Gate (MD050) Mississippi Valley Type occurrences in Medfra B-3 quadrangle. The Bermuda prospect is on land selected or conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

References

MRDS Number 10307792

References

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.)
Schmidt, J.M., 1997, Shale-hosted Zn-Pb-Ag and barite deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral deposits of Alaska, 1997: Economic Geology Monograph 9, p. 35-65.
Reporters Bundtzen, T.K. (Pacific Rim Geological Consulting)
Last report date 6/2/1998