Van Horn

The Van Horn is a molybdenum and copper mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Van Horn

Commodity

Primary: Molybdenum
Primary: Copper

Location

State: Alaska
District: Juneau (Skagway subdistrict)

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Iron-stained altered zones.

Rocks

Name: Hornfels
Role: Associated
Age Type: Associated Rock
Age Young: Late Permian

Analytical Data

Not available

Materials

Not available

Comments

Comment (Workings): Workings / 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.

Comment (Deposit): Model Name = Weakly mineralized shear zone. There is little information on which to assign a model type.

Comment (Deposit): Other Comments = the prospect is within Glacier Bay National Park and Preserve where exploration and development are restricted.

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Brew and others, 1978

Comment (Geology): 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).

Comment (Geology): Age = Cretaceous or younger based on the age of the associated intrusive rocks (Brew and others, 1978).

References

Reference (Deposit): MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.

Reference (Deposit): Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.

Reference (Deposit): MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1967, Mineral resources of Glacier Bay National Monument, Alaska: U. S. Geological Survey Open-File Report 151, 176 p.

Reference (Deposit): Berg, H.C., 1984, Regional geologic summary, metallogenesis, and mineral resources of southeastern Alaska: U.S. Geological Survey Open-file Report 84-572, 298 p., 1 plate, scale approx. 1:600,000.

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