Wild One Occurrence, Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Wild One Occurrence	Occurrence
Delta River Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

Location: The Wild One occurrence, west of Fish Lake at an elevation of about 4,000 feet, is 0.4 mile southwest of VABM Wild. It is about 800 feet north of the center of section 32, T. 19 S., R. 9 E., Fairbanks Meridian.
Geology: The rock at this occurrence is the Fish Lake mafic-ultramafic intrusive complex of Late Triassic age, which is believed to be a lopolithic feeder of the Nikolai basalt flows (Nokleberg and others, 1991). A gabbroic unit of the third magmatic cycle of the complex hosts the occurrence, which consists of angular boulders and rubble composed of sulfide-bearing melagabbro and gabbro (W.T. Ellis, unpublished data, 1996). The melagabbro is serpentinized and contains about 5 percent disseminated pyrrhotite and about 1 percent chalcopyrite and pentlandite as inclusions in the pyrrhotite. An American Copper and Nickel Company sample contained 0.14 percent copper, 0.13 nickel, 56 parts per billion (ppb) palladium, and 40 ppb platinum (W.T. Ellis, unpublished data, 1996).
Workings: Grab samples collected by American Copper and Nickel Company contained as much as 0.14 percent copper, 0.13 percent nickel, 56 parts per billion (ppb) palladium, and 40 ppb platinum. The occurrence is on active Fort Knox Gold Resource.
Age: Late Triassic, the age of the host rock.
Alteration: Serpentinization of the olivine melagabbro.

Commodities (Major) - Cu, Ni; (Minor) - Pd, Pt
Development Status: None
Deposit Model: Ni-Cu-PGE in differentiated mafic-ultramafic sill.

Other Databases

Link to USGS - Alaska:	MH176

Other Regions, Features and Areas containing this locality

References