The Upper Daly-Alaska is a lead, gold, silver, zinc, and copper 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
Elevation:
Commodity: Lead, Gold, Silver, Zinc, Copper
Lat, Long: 56.02917, -130.03750
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Upper Daly-Alaska MRDS details
Site Name
Primary: Upper Daly-Alaska
Secondary: Hoosier
Secondary: Bertha
Secondary: Western
Commodity
Primary: Lead
Primary: Gold
Primary: Silver
Primary: Zinc
Primary: Copper
Location
State: Alaska
District: Hyder
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
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: Mineralized greenstone country rock is silicified and partly replaced by calcite and disseminated pyrite.
Rocks
Role: Host
Age Type: Host Rock
Age Young: Jurassic
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Chalcopyrite
Ore: Galena
Ore: Pyrite
Ore: Pyrrhotite
Ore: Sphalerite
Ore: Tetrahedrite
Gangue: Calcite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Polymetallic veins
Comment (Deposit): Other Comments = the first claims on this property were located in 1912 and 1913. Descriptions of the Daly-Alaska property in early reports (Chapin, 1916, p. 97; Westgate, 1922, p. 128, 131-133; Buddington, 1925, p. 74, 83-84; 1929, p. 43-44, 86-88; Buddington and Chapin, 1929, p. 318, 327, 357-358), which were summarized by Cobb (1978, p. 23-24), do not consistently distinguish between the upper and lower workings. Elliott and Koch (1981, locs. 65, 66), however, describe the upper and lower workings separately, and their descriptions are used in this report (also see lower Daly-Alaska mine, BC065).? In early reports, the name New Alaska Mining Company apparently applied in general to the Daly-Alaska property.
Comment (Production): Production Notes = A little ore was probably mined, but there is no public record of the amount of production.
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = The country rocks in the area of this site are pelitic metasedimentary and subordinate andesitic (greenstone) metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Triassic Texas Creek Granodiorite, which intrudes the Hazelton; the Eocene Boundary Granodiorite, which intrudes the Hazelton and Texas Creek rocks; and still-younger Tertiary lamprophyre dikes, which cut all the other rocks (Smith, 1973, 1977; Koch, 1996).? the deposit at the upper Daly-Alaska mine (Elliott and Koch, 1981, loc. 66) is in fractured zones in silicified greenstone, tuff, and quartz porphyry. The zones contain disseminated pyrite, calcite veinlets, quartz gash veinlets, and bands and patches of relatively massive sulfide minerals. Sphalerite, galena, and pyrite are reported, along with lesser amounts of tetrahedrite, chalcopyrite, pyrrhotite and arsenopyrite. Selected samples of the sulfides probably contain silver and some gold.? Concentrated sulfide samples from a shear zone at the upper Daly-Alaska mine site yielded an Eocene lead-isotope age (Maas and others, 1995, p. 254, 259). The deposit, however, is similar in mineralogy, structural setting, and hostrock to isotopically dated Jurassic deposits nearby in the Hyder district (see, for example, BC065, 067). The lode thus may be polygenetic, originating as a 'disseminated' deposit during Jurassic (Hazelton) island-arc volcanism (Alldrick, 1993), and then partly remobilized into shear zones during emplacement of the Boundary Granodiorite.
Comment (Workings): Workings / Exploration = Deposit was explored by open cuts and more than 100 feet of underground workings, mainly between about 1915 and 1925.
Comment (Reference): Primary Reference = Elliott and Koch, 1981
Comment (Geology): Age = Concentrated sulfide samples from a shear zone at the upper Daly-Alaska mine site yielded an Eocene lead-isotope age (Maas and others, 1995, p. 254, 259). The deposit, however, is similar in mineralogy, structural setting, and hostrock to isotopically dated Jurassic deposits nearby in the Hyder district (see, for example, BC065, 067). The lode thus may be polygenetic, originating as a 'disseminated' deposit during Jurassic (Hazelton) island-arc volcanism (Alldrick, 1993), and then partly remobilized or reconstituted into shear zones during emplacement of the Boundary Granodiorite.
Comment (Geology): Age = Host rock is similar to isotopically dated Jurassic deposits nearby.
References
Reference (Deposit): Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p.
Reference (Deposit): Smith, J.G., 1973, A Tertiary lamprophyre dike province in southeastern Alaska: Canadian Journal of Earth Sciences, v. 10, p. 408-420.
Reference (Deposit): Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p.
Reference (Deposit): Buddington, A.F., and Chapin, Theodore, 1929, Geology and mineral deposits of southeastern Alaska: U.S. Geological Survey Bulletin 800, 398 p.
Reference (Deposit): Buddington, A.F., 1925, Mineral investigations in southeastern Alasaka: U.S. Geological Survey Bulletin 773, p. 71-139.
Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-922, 98 p.
Reference (Deposit): Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.
Reference (Deposit): Westgate, L.G., 1922, Ore deposits of the Salmon River district, Portland Canal region: U.S. Geological Survey Bulletin 722, p. 117-140.
Reference (Deposit): Chapin, Theodore, 1916, Mining developments in southeastern Alaska: U.S. Geological Survey Bulletin 642, p. 73-104.
Reference (Deposit): Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.
Reference (Deposit): Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.
Reference (Deposit): Alldrick, D.J., 1993, Geology and metallogeny of the Stewart mining camp, northwestern British Columbia: British Columbia Department of Mines and Petroleum Resources Bulletin 85, 105 p., 2 plates.
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