Mine detail: Golden Zone

Previously called ''

<< Back to the map

Location

Lat / long: 63.21358, -149.64983

Resource(M)

Primary: Silver, Gold
Ore: Arsenopyrite, Chalcopyrite, Galena, Pyrite, Sphalerite, Tetrahedrite
Gangue: Calcite, Quartz, Sericite

Production

Operation type: Unknown
Development status: Producer

Geology

Alteration processes:Alteration and mineral zonation is present around the Golden Zone pipe. A distal lead and zinc halo is reported up to 2 miles from the pipe; the gold/silver ratios in arsenopyrite and chalcopyrite show a systematic variation; and red-bed sediments show widespread bleaching (C.C. Hawley, oral communication, 1999). Propylitic haloes consisting of epidote-carbonate-chlorite are present at the margin of the quartz diorite stock, and hornfels-skarn zones are in carbonate-rich country rock. Sericite is the dominant alteration mineral in the breccias, and argillic overprinting (?), quartz flooding and Fe-carbonates are also reported, but their paragenesis is as yet unclear.

References

MRDSA011313
DEP10308860
Reference{Deposit:: Capps, S.R., 1924, Geology and mineral resources of the region traversed by the Alaska Railroad: U.S. Geological Survey Bulletin 755-C, p. 73-150.}{Deposit:: Capps, S.R., 1933, The eastern portion of Mount McKinley National Park: U.S. Geological Survey Bulletin 836, p. 219-300.}{Deposit:: Ross, C.P., 1933, The Valdez Creek mining district, Alaska: U.S. Geological Survey Bulletin 849, p. 289-467.}{Deposit:: Wells, R.R., 1956, Laboratory concentration of various Alaska copper ores: U.S. Bureau of Mines Report of Investigations 5245, 9 p.}{Deposit:: Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.}{Deposit:: Mulligan, J.J., Warfield, R.S., and Wells, R.R., 1967, Sampling a gold-copper deposit, Golden Zone Mine, south-central Alaska: U.S. Bureau of Mines Open-File Report 9-67, 59 p.}{Deposit:: Hawley, C.C., and Clark, A.L., 1968, Occurence of gold and other metals in the upper Chulitna district, Alaska: U.S. Geological Survey Circular 564, 21 p.}{Deposit:: Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.}{Deposit:: Swainbank, R.C., Smith, T.E., and Turner, D.L., 1977, Geology and K-Ar age of mineralized intrusive rocks from the Chulitna mining district, central Alaska, in Short notes on Alaskan geology-1977: Alaska Division of Geological and Geophysical Surveys, Geologic Report 55, p. 23-28.}{Deposit:: Hawley, C.C., and others, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska. Contract No. JO166107: U.S. Bureau of Mines Open-File Report 24-78, 274 p., 12 sheets.}{Deposit:: Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-1062, 113 p.}{Deposit:: Eakins, G.R., Bundtzen, T.K., Lueck, L.L. Green, C.B., Gallagher, J.L., and Robinson, M.S., 1985, Alaska mineral industry, 1984: Alaska Division of Geological and Geophysical Surveys Special Report 38, 57p.}{Deposit:: Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.}{Deposit:: Balen, M.D., 1990, Geochemical sampling results from the Bureau of Mines Investigations in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 34-90, 218 p., 2 plates, scale 1:250,000.}{Deposit:: Balen, M.D., 1990, The feasibility of mining in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 40-90, 58 p.}{Deposit:: Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1992, Mineral investigations in the Valdez Creek mining district, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 659 p., 2 plates, scale 1:250,000.}{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.}{Deposit:: Burns, L.E., 1997, Portfolio of aeromagnetic and resistivity maps of the Chulitna mining district: Alaska Division of Geological and Geophysical Surveys Public-Data File 97-7, 13 p.}
ReporterN. Van Wyck