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
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Granite Tunnel group MRDS details
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Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.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.
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