Unnamed (on San Juan Bautista Island)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale B-4
Latitude 55.42129
Longitude -133.25561
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,100 feet about 1.1 mile east-northeast of Bautista Peak. It is about 0.3 mile southeast of the center of section 28, T. 74 S., R. 80 E.

Geologic setting

Geologic description

This prospect is associated with a small Cretaceous granitic stock that makes up the center of San Juan Bautista island. The stock intrudes Devonian graywacke, mudstone, and siltstone of the Port Refugio Formation, which crops out along the entire coastline of the island (Eberlein and others, 1983; Brew, 1996). The occurrence consists of minor pyrite and chalcopyrite disseminated in diorite (Clark and others, 1970 [OF 418]).
Geologic map unit (-133.257300509456, 55.4209545958824)
Age of mineralization Probably related to the emplacement of Cretaceous diorite.

Production and reserves

Indication of production None

Additional comments

The subsurface rights to the land in the vicinity of this prospect are held by the Sealaska Corporation.