Cindy Occurrence, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Cindy Occurrence	Occurrence
Koyukuk Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

See also: Mike (CH100), Vicki (CH097), Pilgrim (CH099), Evelyn Lee (CH059), Luna (CH101), Victor (CH064), and Ginger (CH060). In early reports (DeYoung, 1978; Newberry and others, 1986) the Cindy prospect is grouped with all or some of the Pilgrim, Mike, and Vicki prospects.
Location: The Cindy occurrence is at an elevation of about 5,100 feet on a peak just east of the headwaters of Robert Creek (sec. 18, T. 34 N., R. 6 W., of the Fairbanks Meridian) and approximately 7 3/4 miles northeast of Horace Mountain. It is about 1 mile south of the Vicki prospect (CH097). The location is accurate within a 1/2-mile radius.
Geology: The Cindy occurrence is one of a number of skarn deposits in the Chandalar area which have been described in general by Newberry and others (1986). These skarns are all located northwest of a belt of Devonian(?) granitic rocks informally named the Horace Mountain plutons. Many exhibit both prograde and retrograde mineral assemblages. Newberry and others (1986) stated that the mineralogy, mineralization, and alteration of these skarns categorize them as continental-margin, porphyry-related copper skarns. Early reports (DeYoung, 1978) group the Cindy prospect with the Mike (CH100), Vicki (CH097), and Pilgrim (CH099) prospects, all of which Newberry and others (1986) classified as Cu (Zn-Ag?) skarns. The mineralogy of a specimen (identified only as being from the Mike-Vicky-Cindy prospects) includes epidote, chalcopyrite, pyrite, and sphalerite (Newberry and others, 1986). Analyses of this specimen ran 0.25 percent Cu, 0.83 percent Zn, 0.002 percent Pb, and 0.5 ppm Ag. A listing for the Cindy prospect on the Ventures Resource Corporation (currently exploring Doyon, Limited lands in the Chandalar area) website (1998, URL http://www.venturesresource.com/) classifies it as a gold deposit, although no data are given.
Workings: Claims located in 1972. Surface sampling.
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) - Ag, Au(?), Cu; (Minor) - Pb, Zn
Development Status: None
Deposit Model: Cu skarn deposits (Cox and Singer, 1986; model 18b)

Other Databases

Link to USGS - Alaska:	CH098

Other Regions, Features and Areas containing this locality

References