Alaska
Past Producer

Rainbow

Alaska, United States
GoldZincLeadArsenicSilver
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
SecondaryZinc, Lead, Arsenic, Silver
Commodity typeM
Deposit
Model273: Low-sulfide Au-quartz vein
Materials
Ore mineralsArsenopyrite, Galena, Pyrite, Sphalerite, Gold
GangueCalcite, Quartz
Geology
Host rockDiorite
AlterationAlteration was not described specifically at the Rainbow. In general for the Reid Inlet area, Rossman (1959, p. 43) says that the vein walls are altered for up to 10-15 feet from the veins. Oxidation formed a rust-red color, consistent with either sulfides or ankerite disseminated in the altered zone. MacKevett and others (1971, p. 59) noted abundant secondary iron minerals, gouge, and scattered free gold in the altered vein zones.
Economic & production
Development statusPast Producer
Identification
Deposit ID10002251
MRDS IDA013153
RegionNA
Data scoreB
Coordinates58.87778, -136.83768
References
Rossman, Darwin, 1959, Geology and ore deposits in the Reid Inlet area, Glacier Bay, Alaska: U.S. Geological Survey Bulletin 1058-B, p. 33-58.MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.