Ginger Prospect, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Ginger Prospect	Prospect
Koyukuk Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

See also: Evelyn Lee (CH059), Hurricane-Diane (CH062), and Luna (CH101). Alaska Kardex No. 031-53H (Kardex is a card file mining claim information system located at the State of Alaska DNR Public Information Center in Fairbanks).
Location: This site is at an elevation of about 4,550 feet on the ridge between Big Spruce Creek and Sheep Creek (NE1/4 sec. 11, T. 33 N., R. 8 W., of the Fairbanks Meridian) approximately 5 miles northwest of Horace Mountain. The location is accurate within a 1/2-mile radius.
Geology: The Ginger prospect is one of a number of skarn prospects in the Chandalar area. Published information specific to the geology of individual skarns is scarce. Early reports described the Ginger prospect as copper sulfides and/or malachite-azurite stains in a thrust fault-bounded block of Skajit Limestone, along with isolated tactite bodies containing less than 0.2 percent Cu. Later descriptions by Newberry and others (1986) included the Ginger prospect in a group of skarn deposits northwest of a belt of Devonian(?) granitic rocks informally named the Horace Mountain plutons. Many of these skarns exhibit both garnet/pyroxene prograde and epidote/actinolite retrograde mineral assemblages. Newberry and others (1986) stated that the mineralogy, mineralization, and alteration of these skarns tend to place them in the category of continental-margin, porphyry-related copper skarns. A notation on the Newberry and others (1986) prospect location map classified the Ginger prospect as a Cu-Ag skarn. The prospect is located in an area mapped by Dillon and others (1996) as Devonian tactite and Devonian aplite (a component of the Horace Mountain plutonic assemblage), within a more extensive terrane of phyllite and marble. Newberry and others (1986) described the mineralogy of a hand specimen from this prospect as epidote, actinolite, chalcopyrite, pyrite and magnetite and the metal content as 7.8 percent Cu and 57 ppm Ag. In a listing posted on the Ventures Resource Corporation (currently exploring Doyon lands in the area under an exploration agreement with Doyon, Limited) website (URL http://www.venturesresource.com/), the Ginger prospect is noted as a Cu prospect.
Workings: Eight lode claims staked in 1969-70.
Age: Devonian(?) based on reported Early Devonian Pb/Pb zircon ages from the associated Baby Creek batholith and Horace Mountain plutons (Dillon and others, 1996).
Alteration: Calc-silicate.

Commodities (Major) - Cu
Development Status: None
Deposit Model: Cu skarn deposits (Cox and Singer, 1986; model 18b)

Other Databases

Link to USGS - Alaska:	CH060

Other Regions, Features and Areas containing this locality

References