Unnamed Prospects

The Unnamed Prospects is a silver, copper, and lead mine located in San Juan county, Colorado at an elevation of 10,000 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

Name: Unnamed Prospects  

State:  Colorado

County:  San Juan

Elevation: 10,000 Feet (3,048 Meters)

Commodity: Silver, Copper, Lead

Lat, Long: 37.70167, -107.76333

Map: View on Google Maps

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.


Satelite image of the Unnamed Prospects

Unnamed Prospects MRDS details

Site Name

Primary: Unnamed Prospects


Commodity

Primary: Silver
Primary: Copper
Primary: Lead


Location

State: Colorado
County: San Juan
District: Engineer Mountain Area


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, Unnamed Faults, Unnamed Syncline


Alterations

Alteration Type: L
Alteration Text: Fe Oxides, Cu Carbonate


Rocks

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

Name: Trachyte
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene


Analytical Data

Analytical Data: SCOTT'S (1983) SAMPLES OF FE-STAINED LIMESTONE FROM SOUTH PROSPECTS CONTAINED 0.2 OZ/TON AG. LIMESTONE SAMPLES CONTAINING GALENA, BARITE, AND CU CARBONATES CONTAINED 0.7 TO 1.5 OZ/TON AG, 0.12 TO 0.55% PB, 0.02 TO 0.03% CU.


Materials

Gangue: Calcite
Gangue: Barite
Gangue: Limonite
Gangue: Hematite
Gangue: Malachite
Gangue: Epidote
Gangue: Dolomite


Comments

Comment (Workings): SURFACE PROSPECT PITS; ONE TUNNEL OF UNKNOWN EXTENT HEADING GENERALLY EAST

Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). EAST OF AND BELOW U.S. ROUTE 550 0.5 TO 0.7 MILE EAST OF COAL BANK PASS ALONG UNNAMED TRIBUTARY OF COAL CREEK, 2.1 TO 2.3 MILES EAST OF ENGINEER MOUNTAIN. (UNSURVEYED SECTION). ; INFO FROM LAND.ST :1975

Comment (Deposit): NW-TRENDING UNCOMPAHGRE FM (PRECAMBRIAN) QUARTZITES AND SLATES LIE IN FAULT CONTACT WITH FOLDED PALEOZOIC LIMESTONES. FAULTS APPARENTLY DIE OUT TO NW INTO FOLDS IN PALEOZOIC SECTION. NORTH PROSPECTS LIE ON N 36 W-TRENDING FAULT; SOUTH PROSPECTS LIE IN SYNCLINE NORTH OF N 66 W-TRENDING FAULT.


References

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. 21.

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

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


Colorado Mining Photos

Placer mines at Cripple Creek, Colorado ca. 1892

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