Three Cub

The Three Cub is a copper, gold, silver, tungsten, antimony, lead, and zinc mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Three Cub  

State:  Alaska

County:  na

Elevation:

Commodity: Copper, Gold, Silver, Tungsten, Antimony, Lead, Zinc

Lat, Long: 61.7659, -153.63420

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Satelite image of the Three Cub

Three Cub MRDS details

Site Name

Primary: Three Cub


Commodity

Primary: Copper
Primary: Gold
Primary: Silver
Primary: Tungsten
Primary: Antimony
Primary: Lead
Primary: Zinc


Location

State: Alaska
District: McGrath


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:


Physiography

Not available


Mineral Deposit Model

Model Name: Polymetallic veins


Orebody

Not available


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Silicification and local calc-silicate skarn.


Rocks

Not available


Analytical Data

Not available


Materials

Ore: Stibnite
Ore: Sphalerite
Ore: Scheelite
Ore: Pyrite
Ore: Galena
Ore: Chalcopyrite
Ore: Arsenopyrite
Gangue: Quartz
Gangue: Barite


Comments

Comment (Commodity): Gangue = carbonate

Comment (Exploration): Status = Inactive

Comment (Workings): Workings / Exploration = Surface observation and sampling has occurred at this locality.

Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986, model 22c)

Comment (Geology): Geologic Description = Thin, sulfide-bearing quartz veins, generally less than 15 cm wide, locally crosscut Jurassic or Lower Cretaceous graywacke and Upper Cretaceous or Tertiary granitic rocks at this locality (Allen, 1990; Allen and others, 1990; Allen and Slaughter, 1990). The veins consist dominantly of quartz, carbonate, pyrite, and arsenopyrite, and less commonly contain barite, chalcopyrite, stibnite, galena, and sphalerite. Some aplite dikes, quartz veins, and pyrite-bearing fracture surfaces in the granitic rocks contain scheelite and arsenopyrite. Calc-silicate skarn is very locally developed in sedimentary rocks adjacent to the granitic rock contacts. Quartz veins in graywacke contain as much as 1.3 ppm gold, 70 ppm silver, 3,000 ppm copper, and 500 ppm zinc. A sample from a sulfide-rich quartz-carbonate vein at a granitic rock contact contained 1.9 ppm gold, 150 ppm silver, 2,000 ppm arsenic, 150 ppm bismith, 1,000 ppm lead, 1,000 ppm antimony, 50 ppm tin, and 3,000 ppm zinc. Although scheelite has been reported in quartz veins from the general area, samples at this locality contained less than 20 ppm tungsten. The granitic rocks are part of the Alaska-Aleutian Range batholith (Reed and Lanphere, 1973).

Comment (Geology): Age = Late Cretaceous or Tertiary. The veins crosscut Upper Cretaceous or Tertiary granitic rocks of the Alaska-Aleutian Range batholith.

Comment (Reference): Primary Reference = Allen, 1991


References

Reference (Deposit): Allen, M. S., Malcolm, M. J., Motooka, J. M., and Slaughter, K. E., 1990, Geologic description, chemical analyses, and sample locality map for rock samples collected from the eastern part of the Lime Hills quadrangle, Alaska: U.S. Geological Survey Open-File Report 90-69, 49 p..

Reference (Deposit): Allen, M.S., and Slaughter, K. E., 1990, Mineralogical data and sample locality map of nonmagnetic, heavy-mineral-concentrate samples collected from the eastern part of the Lime Hills quadrangle, Alaska: U.S. Geological Survey Open-File Report 90-67, 64 p., 1 plate, scale 1:250,000.

Reference (Deposit): Allen, M.S, 1990, Gold anomalies and newly identified gold occurrences in the Lime Hills quadrangle, Alaska , and their association with the Hartman sequence plutons, in Goldfarb, R. J., Nash, J. T., and Stoeser, J. W., eds., Geochemical studies in Alaska by the U.S. Geological Survey, 1989: U.S. Geological Survey Bulletin 1950, p. F1-F16.

Reference (Deposit): Reed, B. L., and Lanphere, M. A., 1973, Alaska-Aleutian Range batholith-- Geochronology, chemistry, and relation to circum-Pacific plutonism: Geological Society of America Bulletin, v. 84, no. 8, p. 2583-2610.

Reference (Deposit): Nokleberg, W.J., and others, 1994, Metallogeny and major mineral deposits of Alaska and Metallogenic map of significant metalliferous lode deposits and placer districts of Alaska, in Plafker, G. and Berg, H.C., eds., The Geology of Alaska: Boulder, Colorado, Geological Society of America: The Geology of North America, v. G1, p. 855-904 and v. G1, Plate 11, scale 1:2,500,000.


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