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

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

See also: Mike (CH100), Vicki (CH097), Evelyn Lee (CH059), Luna (CH101), Victor (CH064), and Ginger (CH060). In early reports (DeYoung, 1978) the Pilgrim prospect is grouped with the Cindy, Mike, and Vicki prospects.
Location: The Pilgrim occurrence is at an elevation of about 4,600 feet just east of the headwaters of Robert Creek (SW1/4 sec. 24, T. 34 N., R. 7 W., of the Fairbanks Meridian) approximately 6 miles northeast of Horace Mountain and about 1 1/4 mile south-southeast of the Mike prospect (CH100). The location is accurate within a 1/2-mile radius.
Geology: The Pilgrim occurrence is one of four previously grouped occurrences which, in addition to Pilgrim, included Vicki (CH097), Cindy (CH098), and Mike (CH100) (DeYoung, 1978). Newberry and others (1986) described in general a group of skarn prospects in the Chandalar area that includes the Pilgrim occurrence. This group of skarns is northwest of a belt of Devonian(?) granitic rocks informally named the Horace Mountain plutons. Many of the skarns 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 data on these prospects (as a group) indicated the presence of small amounts of tactite-associated copper mineralization (DeYoung, 1978). Newberry and others (1986) classified the Pilgrim prospect as a Cu-Zn-Pb deposit, and Newberry and others (1997) classify it as a calcic Cu skarn. The mineralogy of a specimen from the Pilgrim prospect includes garnet, epidote, actinolite, pyrite, sphalerite, and chalcopyrite (Newberry and others, 1986). Analyses of this specimen ran 12.4 percent Cu, 0.24 percent Zn, and 71 ppm Ag. A listing for the Pilgrim 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 Cu-Au deposit, although no supporting data are given.
Workings: Claims located in 1972.
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) - Zn
Development Status: None
Deposit Model: Cu skarn deposits (Cox and Singer, 1986; model 18b)

Other Databases

Link to USGS - Alaska:	CH099

Other Regions, Features and Areas containing this locality

References