Prospect, Inactive

Commodities and mineralogy

Main commodities Ag
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SD
Quadrangle map, 1:63,360-scale C-5
Latitude 57.64334
Longitude -133.49161
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Croney the adit is about 0.1 mile south of peak 2770 or about 2 miles south of the abandoned town of Sumdum at the head of Sanford Cove. The adit is about 0.6 mile south-southeast of the center of section 2, T. 49 S., R. 74 E.

Geologic setting

Geologic description

The Croney claim, which adjoins the Sumdum Chief Mine (SD028) was patented in 1900 and consists of an open cut and a 27-foot adit (Kimble and others, 1984). The deposit consists of a stringer zone of quartz that strikes N 83 E and dips 78 N. The zone is parallel to the bedding of the host rock, which is Cretaceous graphitic limestone (Brew and Grybeck, 1984). Several samples were devoid of substantial metal values but all contained 1 to 3 parts per million silver.
Geologic map unit (-133.493326018092, 57.6429992672737)
Age of mineralization Cretaceous or younger based on the age of the host rock.

Production and reserves

Workings or exploration The only workings are a trench and a 27-foot adit.
Indication of production None

Additional comments

The prospect is in the Chuck River Wilderness Area which is closed to mineral exploration and mining.