Unnamed (west of Mount Sumdum)

Occurrence, 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 D-5
Latitude 57.80813
Longitude -133.48584
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 1.8 miles west of Mount Sumdum at an elevation of about 4,000 feet. It is about 0.2 mile east of the center of section 7, T. 47 S., R. 74 E.

Geologic setting

Geologic description

This occurrence consists of a quartz vein in Cretaceous gneiss near its contact with Tertiary or Cretaceous tonalite (Brew and Grybeck, 1984; Kimble and others, 1984). A 0.8-foot channel sample across the vein contained 30 parts per million silver.
Geologic map unit (-133.487562041307, 57.8077964228326)
Mineral deposit model Silver in quartz vein.
Age of mineralization Probably Cretaceous or younger based on the age of the host rock.

Production and reserves

Indication of production None

Additional comments

The occurrence is in the Tracy Arm-Fords Terror Wilderness Area which is closed to mineral exploration and mining.

References