Unnamed Prospect

The Unnamed Prospect is a silver mine located in La Plata county, Colorado at an elevation of 8,901 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
Secondary: Copper

Location

State: Colorado
County: La Plata
District: Cascade District

Land Status

Land ownership: National Forest
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.
Administrative Organization: San Juan N. F.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
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: Polymetallic veins

Orebody

Not available

Structure

Type: R
Description: San Juan Uplift

Type: L
Description: Needle Mtns Uplift

Alterations

Alteration Type: L
Alteration Text: Fe Oxidation

Rocks

Name: Gabbro
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 1454.000000+-
Dating Method: Rb-Sr
Age Young: Precambrian

Name: Gabbro
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 1460.000000+-
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Precambrian

Name: Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Analytical Data

Analytical Data: DUMP SAMPLE OF LIMONITE-STAINED QUARTZ-PYRITE CONTAINED 8.8 OZ/TON AG AND 0.03% CU

Materials

Ore: Pyrite
Gangue: Quartz
Gangue: Limonite

Comments

Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). WITHIN 600 FT NE OF NORTH END OF COLUMBINE LAKE ; INFO FROM LAND.ST :1974

Comment (Deposit): PROBABLE QUARTZ VEIN CUTTING GENERALLY NE-TRENDING FOLIATION OF METASEDIMENTARY ROCKS

Comment (Workings): ONE SHAFT OF UNKNOWN DEPTH

References

Reference (Deposit): CROSS, WHITMAN, AND HOLE, A.D., 1910, DESCRIPTION OF THE ENGINEER MOUNTAIN QUADRANGLE: USGS FOLIO 171.

Reference (Deposit): BARKER, FRED, 1969, PRECAMBRIAN GEOLOGY OF THE NEEDLE MOUNTAINS, SOUSOUTHWESTERN COLORADO: USGS PROF. PAPER 644-A.

Reference (Deposit): SCOTT, D.C., 1983, MINERAL INVESTIGATION OF THE WEST NEEDLE WILDERNESS STUDY AREA AND THE BLM WEST NEEDLE CONTIGUOUS WILDERNESS STUDY AREA,LA PLATA AND SAN JUAN COUNTIES, COLORADO: USBM MLA 35-83, P. 18.

Colorado Mining Photos

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