Lower Daly-Alaska; Iron; Elevenmile Mine, Hyder Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi

Regional Level Types
Lower Daly-Alaska; Iron; Elevenmile Mine	Mine
Hyder Mining District	Mining District
Prince of Wales-Hyder Census Area	Census Area
Alaska	State
USA	Country

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).
Location: The lower Daly-Alaska mine is in Section 25 at an elevation of about 400 feet on lower Daly Creek (Elliott and Koch, 1981, p. 16, loc. 65). The location is accurate within about 100 feet. Also see upper Daly-Alaska mine (BC066), and Additional Comments field, below.
Geology: 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).
Workings: 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.
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).
Alteration: Greenstone hostrock is pyritized and silicified.
Production: An unknown amount of ore reportedly was shipped from the property, probably between 1915 and 1925.

Commodities (Major) - Ag, Au, Cu, Pb, Zn
Development Status: Yes; small
Deposit Model: Polymetallic veins

Other Databases

Link to USGS - Alaska:	BC065

Other Regions, Features and Areas containing this locality

References