Marble Heart

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Pb
Ore minerals galena

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale B-3
Latitude 55.32245
Longitude -132.73249
Nearby scientific data Find additional scientific data near this location
Location and accuracy The location of the Marble Heart prospect is uncertain. The primary and almost only description of it is by Brooks (1902). Herreid and Rose (1966) place it just outside the area they mapped. The Herreid and Rose location used for this record is about 1.8 miles south of the head of Twelvemile Arm and about 0.2 mile west of the center of section 36, T. 75 S., R. 83 E.

Geologic setting

Geologic description

As described by Brooks (1902), the Marble Heart prospect consists of a small vein of galena in intensely folded and metamorphosed limestone. The limestone is part of the Wales Group of Cambrian and older age (Eberlein and others, 1983; Brew, 1996). The workings consist of a shaft about 20 feet deep and a short adit.
Geologic map unit (-132.734138319402, 55.322097772646)
Mineral deposit model Galena vein in limestone.
Age of mineralization Galena vein in limestone of Cambrian or older age.

Production and reserves

Workings or exploration The workings consist of a shaft about 20 feet deep and a short adit.
Indication of production None