Van Horn

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu; Mo

Geographic location

Quadrangle map, 1:250,000-scale SK
Quadrangle map, 1:63,360-scale A-3
Latitude 59.02
Longitude -136.11
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is located at an elevation of about 1,500 feet in Glacier Bay National Park and Preserve on the east side of Muir Inlet near Peak 2124 at the southwestern end of Van Horn Ridge. It is near the center of section 8, T. 33 S., R. 56 E. of the Copper River Meridian. It is shown as location 71 on plate III of Brew and others (1978) and location 11 on plate 1 of MacKevett and others (1971).

Geologic setting

Geologic description

Brew and others (1978) describe the prospect as, 'Weakly mineralized iron-stained altered zones in hornfels, shale, and granodiorite. Most of the zones are along faults and are a few feet wide, not persisting along strike.' The hornfels strikes northerly and dip steeply (MacKevett and others, 1971). A composite grab sample of iron-stained shale contained 150 ppm copper and 15 ppm molybdenum (Brew and others, 1978). A select sample of an iron-stained shear zone contained 100 ppm copper and 200 ppm molybdenum (MacKevett and others, 1971). The age of the mineralization is probably Cretaceous or younger based upon the Cretaceous age of the intrusive rocks (Brew and others, 1978).
Geologic map unit (-136.111885945119, 59.0195993028987)
Mineral deposit model Weakly mineralized shear zone. There is little information on which to assign a model type.
Age of mineralization Cretaceous or younger based on the age of the associated intrusive rocks (Brew and others, 1978).
Alteration of deposit Iron-stained altered zones.

Production and reserves

Workings or exploration Brew and others (1978) state that 65 claims were staked on the ridge in 1965 and that a few shallow trenches and pits explore some of the mineralized zones.
Indication of production None

Additional comments

The prospect is within Glacier Bay National Park and Preserve where exploration and development are restricted.