Unnamed Prospect

The Unnamed Prospect is a silver, lead, copper, and gold mine located in Costilla county, Colorado at an elevation of 9,341 feet.

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: Unnamed Prospect

Commodity

Primary: Silver
Primary: Lead
Primary: Copper
Primary: Gold

Location

State: Colorado
County: Costilla
District: El Plomo District

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Model Name: Epithermal veins

Orebody

Not available

Structure

Type: R
Description: Culebra Massif, Rio Grande Rift Zone

Type: L
Description: Unnamed Normal Faults Associated With East Edge Of Rift

Alterations

Not available

Rocks

Name: Latite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene

Name: Latite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Analytical Data

Not available

Materials

Ore: Galena
Ore: Anglesite

Comments

Comment (Location): ON NORTH SIDE OF RITO SECO ON PRIVATE LAND WITHIN THE SANGRE DE CRISTO GRANT, WHICH IS UNSURVEYED: PROBABLE LOCATION BASED ON AIRPHOTO EXAMINATION AND VAN DEIST'S DESCRIPTION ; INFO FROM LAND.ST :(1975)

Comment (Development): SHAFT SUNK APPARENTLY ON SAME FAULT AS AT PLOMOMINE

Comment (Deposit): AU CONTAINED IN QUARTZ-PYRITE REPLACEMENT ALONG MAIN FAULT ZONE . HOST APPEARS TO BE ALTERED LAVA FLOW WITHIN SEQUENCE OF CONGLOMERATES, SANDSTONES, AGGLOMERATES, AND OTHER FLOWS IN SANTA FE AND/OR VALLEJO FMS SIMILAR TO PLOMO (RITO SECO) MINE (ACCORDING TO JOHNSON'S (1969) MAP), BUT VAN DEIST SHOWS HOST TO BE SILORIAN (MORE LIKELY PENNSYLVANIAN) SILICEOUS LIMESTONE IN FAULT CONTACT WITH PRECAMBRIAN GRANITE. FAULT TRENDS N 35 E, 52.5 NW.

References

Reference (Deposit): HOLMES, W.I., 1935, BRIEF REPORT ON THE EAST BLACKMORE TRACT: COLO. STATE PLAN. COMM. UNPUB. REPT., 1 P.

Reference (Deposit): JOHNSON, R.B., 1969, GEOLOGIC MAP OF THE TRINIDAD QUADRANGLE, SOUTH-CENTRAL COLORADO: USGS MAP 1-558.

Reference (Deposit): VAN DEIST, E.C., AND VAN DEIST, P.H., 1898, NOTES ON THE GEOLOGY OF THE WESTERN SLOPE OF THE SANGRE DE CRISTO RANGE IN COSTILLA COUNTY, COLO.: COLO. SCI. SOC. PROC., V. 5, P. 76-80.

Reference (Deposit): GUNTHER, C.G., 1905, THE GOLD DEPOSITS OF PLOMO, SAN LUIS PARK, COLORADO: ECON. GEOLOGY, V. 1, P. 143-154.

Reference (Deposit): VANDERWILT, J.W., 1947, COLO. MINERAL RESOURCES BD., P. 65.

Colorado Mining Photos

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.