Steph

The Steph is a silver 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Steph

Commodity

Primary: Silver
Primary: Copper

Location

State: Alaska
District: Chandalar

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Name: Limestone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Devonian

Analytical Data

Not available

Materials

Ore: Azurite
Ore: Malachite
Ore: Tennantite
Gangue: Quartz

Comments

Comment (Deposit): Other Comments = See also: Bibban (CH090), Bob (CH089), Gayle (CH091), and Mowgli (CH094).

Comment (Deposit): Model Name = Polymetallic veins(?) (Cox and Singer, 1986; model 22c)

Comment (Reference): Primary Reference = Grybeck, 1977

Comment (Workings): Workings / Exploration = Claims (15?) staked by Placid Oil Co. in 1971-1973.

Comment (Geology): Geologic Description = This occurrence is described as malachite, azurite, and tennantite in a quartz vein (Grybeck, 1977). The country rocks are Devonian Skajit Limestone near a large body of greenstone interpreted as schistose hornblende diorite, pyroxene diorite sills, and andesitic flows(?) (Brosgi and Reiser, 1964). No other information is available.

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Cobb, E.H., and Cruz, E.L., 1983, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in the Chandalar quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-278, 91 p.

Reference (Deposit): Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.

The Top Ten Gold Producing States

These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.