Silver Star Extension Mine

The Silver Star Extension Mine is a silver mine located in La Plata county, Colorado at an elevation of 9,501 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: Silver Star Extension Mine  

State:  Colorado

County:  La Plata

Elevation: 9,501 Feet (2,896 Meters)

Commodity: Silver

Lat, Long: 37.61028, -107.77694

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 Silver Star Extension Mine

Silver Star Extension Mine MRDS details

Site Name

Primary: Silver Star Extension Mine


Commodity

Primary: Silver
Tertiary: 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: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year Last Production: 1925
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: Gneiss
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Gneiss
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic


Analytical Data

Analytical Data: LIMONIT-STAINED QUARTZ AND PYRITE SAMPLE FROM ORE PILE AT BASE OF SLOPE CONTAINED 0.6 OZ/TON AG AND 0.01% CU. LIMONITE-STAINED QUARTZ AND PYRITE SAMPLE FROM DUMP AT PORTAL CONTAINED 0.2 OZ/TON AG.


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.). AT SW END OF WEST NEEDLE MTNS ABOVE AND NE OF CASCADE CREEK NEAR RIM. ; INFO FROM LAND.ST :1974

Comment (Development): SCOTT (1983) FOUND MINOR AG OCCURRENCE IN ANALYTICAL DATA BUT STATES THAT ODEL WILEY OF FARMINGTON, NM (IN 1982 PERS. COMM.), CITED PRODUCTION OF LOW-GRADE AG ORE IN 1920S FROM SILVER STAR EXTENSION AND BITTEROOT MINES.

Comment (Workings): ONE TUNNEL OF UNKNOWN EXTENT HEADING PROBABLY NE OR ENE.


References

Reference (Deposit): BARKER, FRED, 1969, PRECAMBRIAN GEOLOGY OF THE NEEDLE MOUNTAINS, SOUTHWESTERN 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 JUA COUNTIES, COLORADO: USBM MLA 35-83, P. 7, 19.

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


Colorado Mining Photos

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