Isolde Mine

The Isolde Mine is a lead, silver, and gold mine located in Hinsdale county, Colorado at an elevation of 12,881 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: Isolde Mine  

State:  Colorado

County:  Hinsdale

Elevation: 12,881 Feet (3,926 Meters)

Primary Mineral: Lead, Silver, Gold

Lat, Long: 37.95028, -107.52917

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 Isolde Mine

Isolde Mine MRDS details

Site Name

Primary: Isolde Mine
Secondary: Patented Claims: Inez, MS 2154
Secondary: Hollister, MS 2155
Secondary: Philadelphia, MS 2156
Secondary: Baltimore, MS 2157
Secondary: Isolde, MS 15635
Secondary: Dupre, MS 15635
Secondary: Belcher, MS 15635
Secondary: Unpatented Claims: World's Fair Nos. 1-12


Commodity

Primary: Lead
Primary: Silver
Primary: Gold
Tertiary: Tellurium
Tertiary: Zinc


Location

State: Colorado
County: Hinsdale
District: Park (Whitecross, Burrows Park, Adams) 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

Owner Name: Southern Union Production Co.
Home Office: Denver, Co.
Years: 1971 -

Owner Name: Ed Hughes Mining Co.
Home Office: Grand Junction, Co.
Years: 1971 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
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

Not available


Orebody

Not available


Structure

Type: R
Description: San Juan Volcanic Field, San Juan Depression

Type: L
Description: San Juan-Uncompahgre Calderas, Lake City Caldera, Silverton Caldera, Eureka Graben


Alterations

Not available


Rocks

Name: Quartz Latite
Role: Associated
Age Type: Host Rock Unit
Age Young: Oligocene

Name: Quartz Latite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene

Name: Quartz Latite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene

Name: Quartz Latite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene


Analytical Data

Not available


Materials

Ore: Sphalerite
Ore: Calaverite
Ore: Pyrite
Gangue: Quartz


Comments

Comment (Location): LOCATION UNCERTAIN, BUT MINE LIES AT HEAD OF CLEVELAND GULCH OR ON ARETE BETWEEN CLEVELAND GULCH AND HORSESHOE BASIN (NE PROJECTION OF WOOD MTN). UNPATENTED CLAIMS REPORTEDLY EXTEND SW INTO SAN JUAN CO. ELEV AND LAT-LONG GIVEN ARE FOR POSSIBLE WORKINGS (IDENTIFIED FROM AIRPHOTO EXAMINATION) ON ISOLDE CLAIM, W2 SW SE AND E2 SE SW SEC. 28 (UNSURVEYED). ; INFO FROM LAND.ST :1977

Comment (Deposit): DEPOSIT LIES IN ALTERED BRECCIA WITHIN QUARTZ LATITE AND SANDSTONE OF THE UNCOMPAHGRE-SAN JUAN CALDERA INFILL SEQUENCE. BROWN (1926) DESCRIBES VEIN AS TYPICAL BRECCIA VEIN IN WHICH HIGHEST VALUES OCCURRED IN BLUE CHALCEDONIC QUARTZ THAT CEMENTS ALTERED ROCK FRAGMENTS.

Comment (Workings): MAIN ADIT DRIVEN PRESUMABLY WEST OR NW, EXTENT UNKNOWN; RAISE OF UNKNOWN HEIGHT DRIVEN FROM OLD STOPE TO SURFACE.


References

Reference (Deposit): WOOLSEY, L.H., 1907, LAKE FORK EXTENSION OF THE SILVERTON MINING AREA, COLORADO: USGS BULL. 315, P. 26-30.

Reference (Deposit): LUEDKE, R.G., AND BURBANK, W.S., 1975, PRELIMINARY GEOLOGIC MAP OF THE HANDIES PEAK QUADRANGLE, COLORADO: USGS OPEN-FILE REPT. OFR-75-431.

Reference (Deposit): BLM MINERAL SURVEY MS 2154, 2155, 2156, 2157, 15635

Reference (Deposit): COLORADO DIV. MINES INF. REPTS.

Reference (Deposit): LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.

Reference (Deposit): BROWN, W.H., 1926, THE MINERAL ZONES OF THE WHITE CROSS DISTRICT AND NEIGHBORING DEPOSITS IN HINSDALE COUNTY. COLORADO: MINES MAG., V. 15, NO. 11, P. 5-15.