Alaska
Occurrence

Colorado Gossan

Alaska, United States
GoldMercuryAntimonyArsenic
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
SecondaryMercury, Antimony, Arsenic
Deposit
Model72: Polymetallic replacement
Materials
Ore mineralsArsenopyrite
GangueTourmaline
Geology
AlterationExtensive oxidation of original sulfide mineralization.
Economic & production
Development statusOccurrence
Identification
Deposit ID10307770
RegionNA
Data scoreB
Coordinates63.56046, -155.97701
References
Mertie, J.B., Jr., 1936, Mineral deposits of the Ruby-Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 864-C, 115-245.Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811-A, 1 sheet, scale l:250,000.Bundtzen, T.K., Pinney, D.S., and Laird, G.M., 1997, Preliminary geologic map and descriptive data tables from the Ophir C-1 and western Medfra C-6 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File Report 97-46, 10 p., 1 sheet, scale 1:63,360.