Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale B-2
Latitude 55.43319
Longitude -132.64092
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Shelton prospect is about 3.4 miles south of Hollis at an elevation of about 1,000 feet. It is about 0.1 mile north of the southwest corner of section 22, T. 74 S., R. 84 E., of the Copper River Meridian.

Geologic setting

Geologic description

A quartz-calcite vein about 6 feet thick cuts fractured marble associated with schist and phyllite that are part of the Descon Formation of Silurian and Ordovician age (Wright and Wright, 1908; Twenhofel and others, 1949; Eberlein and others, 1983; Brew, 1996). The vein strikes N20E and dips 65 SE, and contains 1 to 2 percent pyrite and chalcopyrite. A 6-foot sample across the vein contained 0.25 percent copper. The prospect was explored by a short drift and a 55-foot winze. Maas and others (1991) were not able to find the workings but did find mining debris near the reported site of the prospect. Their samples of quartz in rubble contained 11.8 to 12.3 parts per million silver and 1.8 to 1.92 percent copper.
Geologic map unit (-132.642572596165, 55.4328352425437)
Mineral deposit model Quartz-calcite vein with pyrite and chalcopyrite.
Age of mineralization Unknown, other than that the vein cuts Silurian or Ordovician marble.

Production and reserves

Workings or exploration The prospect was explored by a short drift and a 55-foot winze prior to 1908.
Indication of production None


MRDS Number A010123


Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004