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Granite Tunnel group

Past Producer in Lake county in Colorado, United States with commodities Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Mining district
  9. Bibliographic references
  10. Reporter information

Geologic information

Identification information

Deposit ID 10311058
Record type Site
Current site name Granite Tunnel group
Alternate or previous names Granite Project, includes Bunker Hill, California, Gopher, King Soloman, Magenta, New Year, Robert George, and Yanke, Hersey Mining Corp.

Geographic coordinates

Geographic coordinates: -106.24978, 39.05999 (WGS84)
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Lake(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

South Peak(quadrangle 1:24,000 scale)

Leadville(quadrangle 1:100,000 scale)

Leadville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Lake

Comments on the location information

  • 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.

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Comments on the commodity information

  • 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)

Nearby scientific data

(1) -106.24978, 39.05999
ListMap

Economic information

Comments on the geologic information

  • Gold-bearing NE-trending quartz-sulfide veins in Precambrian rocks.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Mining district

District name Granite District

Comments on the production information

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

Comments on the reserve resource information

  • A 1990 report estimates reserves of about 228,000 oz. of gold in 152,000 tons of ore. (Sunshine files)

Comments on 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.

Reference information

Bibliographic references

  • 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.

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

Reporter information

Type Date Name Affiliation Comment
Reporter 16-MAR-2006 Beach, Richard A. Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.