Suzie Mountain

Prospect, Active

Commodities and mineralogy

Main commodities Pt
Other commodities Cu

Geographic location

Quadrangle map, 1:250,000-scale HG
Quadrangle map, 1:63,360-scale D-5
Latitude 58.96
Longitude -161.652
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on the west ridge of Suzie Mountain and along the west side of Suzie Creek. The site is on the ridge crest at an elevation of about 900 feet and about 3.5 miles northeast of Goodnews Mining Camp. It is in the NE1/4 of section 20, T. 14 S., R. 74 W., of the Seward Meridian. The prospect is accurately located. Cobb's locality number 2 (1972 [MF 362]; 1980 [OF 80-909]) appears to be at this location.

Geologic setting

Geologic description

This prospect is on the west ridge of the Suzie Mountain ultramafic complex, a composite dunite, peridotite, and clinopyroxenite pluton that is inferred to be Jurassic in age (Hoare and Coonrad, 1978; Alaska Earth Sciences, 2000). A geochemical survey in the area of this prospect in 2000 defined 700-meter-long and up to 100-meter-wide soil anomaly that averages 130 parts per billion platinum; the maximum platinum value in the anomaly is 345 ppb Pt (Alaska Earth Sciences, 2000). The anomaly extends northwest from Suzie Creek across the ridge crest at this locality.
In 2004, the Calista Corporation did extensive rock and soil sampling over the prospect and did detailed total field , magnetic susceptibility, and resistivity surveys (Calista Corp., 2004). One rock sample contained 2.5 part per million platinum and many of the soil samples were anomalous in platinum. A coherent zone of ore grade mineralization could not be defined at the surface but the data suggest the potential for deeper mineralization.
A. L. Clark (Cobb, 1972; Cobb, 1980) noted that copper minerals had been found at this locality. Alaska Earth Science (2000) noted that in the Salmon River area traces of chalcopyrite, pyrite, or pyrrhotite are common in surface outcrops of hornblende-bearing rocks in marginal parts of the ultramafic complexes.
Geologic map unit (-161.654223570178, 58.9592169175474)
Mineral deposit model Alaskan PGE (Cox and Singer, 1986; model 9).
Mineral deposit model number 9
Age of mineralization Jurassic, the inferred age of the ultramafic plutons in the area (Hoare and Coonrad, 1978).

Production and reserves

Workings or exploration There has been surface soil and rock sampling at this location (Alaska Earth Sciences, 2000). An aeromagnetic survey was flown over the Salmon River area in 1994, a gravity survey has been completed, and some controlled-source audio magneto-telluric lines have been run over selected parts of the ultramafic complexes (Alaska Earth Sciences, 2000). In 2004, the Calista Corporation did extensive rock and soil sampling over the prospect and did detailed total field , magnetic susceptibility, and resistivity surveys.
Indication of production None

References

References

Reporters Travis L. Hudson (Applied Geology); D.J. Grybeck (Port Ludlow, WA)
Last report date 3/4/2008