Granite Tunnel group

The Granite Tunnel group is a gold mine located in Lake county, Colorado.

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: Granite Tunnel group
Secondary: Granite Project
Secondary: includes Bunker Hill, California, Gopher, King Soloman, Magenta, New Year, Robert George, and Yanke
Secondary: Hersey Mining Corp.

Commodity

Primary: Gold
Secondary: Silver

Location

State: Colorado
County: Lake
District: Granite District

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Commodity): Sample analyses indicate high values of gold in selected samples. (Sunshine files, 1982) Samples collected by the US Bureau of Mines, in the Granite tunnel and from surface mines and dumps showed variable amounts of gold. (Wood, 1983)

Comment (Development): The property includes 11 patented claims, 4 unpatented claims, and 2 unpatented millsite claims; it includes 10 old shallow mines and 14 old shafts. The Granite tunnel is driven SE from Low Pass Gulch more than 1500 ft. to drain and explore veins under the old mines on Yankee Blade Hill.

Comment (Geology): Gold-bearing NE-trending quartz-sulfide veins in Precambrian rocks.

Comment (Location): The property is on the south side of Low Pass Gulch, about 1-1/4 miles NE of Granite, in the S/2 sec. 29, and N/2 sec. 32, T 11 S, R 79 W.

Comment (Production): Records show 241 tons of ore shipped at an average grade of 1.75 oz/ton gold. (Sunshine files)

Comment (Reserve-Resource): A 1990 report estimates reserves of about 228,000 oz. of gold in 152,000 tons of ore. (Sunshine files)

References

Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

Reference (Deposit): Wood, R. H., II, 1983, Mineral investigation of the Buffalo Peaks Wilderness Study Area, Chaffee, Lake, and Park Counties, Colorado: U.S. Bureau of Mines Open File Report MLA 98-83, 46 p.

Colorado Mining Photos

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