Lower Daly-Alaska

The Lower Daly-Alaska is a silver, zinc, lead, gold, 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

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Site Name

Primary: Lower Daly-Alaska
Secondary: Iron
Secondary: Elevenmile

Commodity

Primary: Silver
Primary: Zinc
Primary: Lead
Primary: Gold
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: Greenstone hostrock is pyritized and silicified.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Silver
Ore: Tetrahedrite
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Galena
Ore: Freibergite
Ore: Chalcopyrite
Ore: Arsenopyrite
Gangue: Calcite
Gangue: Quartz

Comments

Comment (Geology): Age = Lead-isotope studies of galena from the lower Daly-Alaska mine (Maas and others, 1995, p. 254) indicate that the deposit is Jurassic in age, contemporaneous, at least in part, with island-arc volcanism in Hazelton time (Alldrick, 1993).

Comment (Reference): Primary Reference = Elliott and Koch, 1981

Comment (Deposit): Model Name = Polymetallic veins

Comment (Deposit): Other Comments = the first Daly-Alaska claims 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 lower and upper workings. Elliott and Koch (1981, locs. 65, 66), however, describe them separately, and their descriptions are used in this report.? An early name that apparently referred in general to the Daly-Alaska property was the New Alaska (Mining Company).? Also see upper Daly-Alaska mine (BC066).

Comment (Commodity): Ore Material = Silver (native)

Comment (Workings): Workings / Exploration = Property was explored by open cuts and developed by a few hundred feet of underground workings from two or more portals, mainly between about 1915 and 1925.

Comment (Production): Production Notes = An unknown amount of ore reportedly was shipped from the property, probably between 1915 and 1925.

Comment (Geology): Geologic Description = The country rocks in the area of the Daly-Alaska property are pelitic metasedimentary and subordinate andesitic (greenstone) metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Triassic Texas Creek Granodiorite, which underlies and locally 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 lower Daly-Alaska mine (Elliott and Koch, 1981, loc. 65) is a shear or breccia zone in pyritized and silicified greenstone that contains quartz-calcite veinlets and sulfide stringers. The sulfides include mainly pyrrhotite, sphalerite, galena, pyrite, tetrahedrite, and chalcopyrite. Buddington (1929, p. 87-88) also reports small amounts of arsenopyrite, freibergite, and native silver at the lower Daly-Alaska site. High silver values and some gold were reported and some ore reportedly was shipped from the property, which was explored by open cuts and developed by a few hundred feet of underground workings from two or more portals.? Lead-isotope studies of galena from the lower Daly-Alaska mine (Maas and others, 1995, p. 254) indicate that the deposit is Jurassic in age, contemporaneous, at least in part, with island-arc volcanism in Hazelton time (Alldrick, 1993).

Comment (Exploration): Status = Inactive

References

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): Chapin, Theodore, 1916, Mining developments in southeastern Alaska: U.S. Geological Survey Bulletin 642, p. 73-104.

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): 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.

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., 1925, Mineral investigations in southeastern Alasaka: U.S. Geological Survey Bulletin 773, p. 71-139.

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): 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): Westgate, L.G., 1922, Ore deposits of the Salmon River district, Portland Canal region: U.S. Geological Survey Bulletin 722, p. 117-140.

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