Hyder Skookum Prospect, Hyder Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi

Regional Level Types
Hyder Skookum Prospect	Prospect
Hyder Mining District	Mining District
Prince of Wales-Hyder Census Area	Census Area
Alaska	State
USA	Country

Location: The Hyder Skookum prospect, in Section 36 near its southern boundary, is at an elevation of about 3150 feet on the southeast wall of Skookum Creek, and about hundred or so feet above the creek (Elliott and Koch, 1981, p. 18, loc. 76). The location is accurate within about 0.2 mile.
Geology: The country rocks in the area of this prospect are pelitic metasedimentary and subordinate andesitic (greenstone) metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which is underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996). Buddington (1929, p. 72) describes two types of deposits at this site. One deposit is a sulfide replacement mass in somewhat schistose greenstone near the contact of a quartz porphyry dike. The mass consists of pyrrhotite and a little chalcopyrite and arsenopyrite. Some sulfides also are disseminated in quartz in the same zone. The other type of deposit comprises two parallel quartz veins up to 7 feet thick that locally form breccias with the quartz porphyry or greenstone country rocks. Some of the country rock fragments in the breccias are impregnated with pyrite and a stringer in the greenstone carries a little disseminated sulfide. Surface exposures of the veins carry a little calcite but are mostly barren of sulfides.
Workings: Deposit was explored by an open cut, probably in the 1920's.
Alteration: Greenstone country rock and fragments of country rocks in breccias are partly replaced by sulfides.

Commodities (Major) - Cu
Development Status: None
Deposit Model: Polymetallic veins

Other Databases

Link to USGS - Alaska:	BC076

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References