Prospect, Undetermined

Commodities and mineralogy

Main commodities Cu

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale C-7
Latitude 57.7412
Longitude -136.2921
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Ultimo prospect is at an elevation of about 150 feet on southwest Hill Island. The prospect is 0.5 mile west-southwest of the northeast corner of sec. 2, T. 48 S., R. 56 E. It is MAS no. 0021140108 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.5 mile.

Geologic setting

Geologic description

Johnson and Karl (1985) map the rocks in the area of this prospect as hornfelsed, Cretaceous graywacke and argillite interbedded with sparse, lenticular beds of recrystallized basalt. The rocks are cut by many steeply-dipping, mainly northwest-striking faults. The only published information about the prospect is that it has been staked for copper (U.S. Bureau of Land Management, 2002).
Geologic map unit (-136.29393179444, 57.7408276725786)

Production and reserves

Indication of production Undetermined

Additional comments

The prospect is in West Chichagof-Yakobi Wilderness.



U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
Reporters H.C. Berg (U.S. Geological Survey)
Last report date 10/16/2004