Clearwater Barite

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ba
Other commodities Zn
Ore minerals barite; pyrite; pyrrhotite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale D-1
Latitude 63.7717
Longitude -150.3406
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Clearwater barite occurrence is exposed on the west bank of the Clearwater River about one mile north of the mouth of Stampede Creek. It is in the NE1/4SW1/4 section 19, T. 13 S., R. 14 W., Fairbanks Meridian. The location is probably accurate within 1000 feet. The occurrence corresponds to number 67 of Bundtzen, Smith, and Tosdal (1976), 149 of Hawley and Associates (1978), 75 of Bundtzen (1981), and 113 of Thornsberry, McKee, and Salisbury (1984).

Geologic setting

Geologic description

The Clearwater Barite occurrence is probably in quartzite and mica-quartz schist of the Birch Creek Schist, possibly on or close to a projection of the Stampede fault (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-1). The occurrence is a vein in a fault zone. The vein strikes about N50W and dips 40SW (Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 113). It is about 6 feet thick and consists of quartz, barite, pyrite, pyrrhotite, and possibly a trace of sphalerite. Bundtzen (1981) estimated about 25 percent barite in one sample, which also contained a trace of gold and 0.017 percent zinc.
Geologic map unit (-150.342901931889, 63.7712108104293)
Mineral deposit model Quartz-barite vein.
Age of mineralization Assuming that the vein is distal to the precious- and base-metal deposits of the Kantishna area, it probably is Eocene (see record MM091).

Production and reserves

Workings or exploration Minor excavation.
Indication of production None

Additional comments

The occurrence is in Denali National Park and Preserve.

References