London Mine group

The London Mine group is a gold mine located in Park county, Colorado at an elevation of 11,499 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

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Site Name

Primary: London Mine group
Secondary: North London Mill 0080930194
Secondary: London-Butte Mine
Secondary: London Fault Adit
Secondary: London Extension 0080930027
Secondary: North London Mine 0080930195
Secondary: South London Mine 0080930239

Commodity

Primary: Gold
Secondary: Silver
Secondary: Lead
Secondary: Copper

Location

State: Colorado
County: Park
District: Alma 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

Type: Patented

Workings

Not available

Ownership

Owner Name: Alma London Joint Venture
Home Office: New Mexico
Info Year: 1980

Owner Name: Boulder Gold, Inc.
Percent: 50.00
Home Office: Colorado
Info Year: 1987

Owner Name: Cobb Resources Corp.
Percent: 50.00
Home Office: New Mexico
Info Year: 1987

Owner Name: Alma American Mining Corp.
Company ID: 500571
Percent: 100.0
Home Office: New Mexico
Info Year: 1980

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Open Stope - Room and Pillar
Milling Method: Flotation
Year First Production: 1874
Discovery Year: 1873
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Galena
Ore: Gold
Ore: Pyrite
Ore: Sphalerite
Gangue: Calcite
Gangue: Quartz
Gangue: Sericite

Comments

Comment (Production): About 2/3 to 3/4 of Alma district production has come from the London mine area. The mine operated continuously from 1875 to 1942; after World War II, operations were intermittent through 1989. Production totals from 1901 to 1931 are: gold, 263,173 oz., silver, 237,178 oz., lead, 5.88 million lb., and copper, 165,000 lb.; in addition, substantial production occurred before 1901 and after 1931. Total gold production is probably around 1 million oz.

Comment (Reserve-Resource): A 1988 estimate stated that 1 million tons of material graded 0.27 oz/ton of gold. (USGS OFR 98-206)

Comment (Location): The London Mine is on London Mountain, about 5 miles west of Alma, in secs. 7 and 18, T 9 S, R 78 W, and secs. 1 and 12, T 9 S, R 79 W.

Comment (Development): THE LONDON MINE HAD BEEN WORKED BETWEEN 1875 AND THE 1940'S. REOPENED IN 1988 AFTER A DECADE OF REHABILITATION, EXPLORATION, AND DEVELOPMENT OF ORE RESERVES. IT CLOSED DOWN AGAIN IN JUNE 1989 BECAUSE OF LACK OF ECONOMICALLY RECOVERABLE ORE AND THE CONTINUED LOW PRICE OF ORE.

Comment (Geology): Gold-quartz veins in faults in porphyry sills in the lower Weber(?) formation in the footwall adjacent to the London reverse fault.

References

Reference (Development): USBM MINERALS TODAY, JANUARY 1990, P. 25.

Reference (Reserve-Resource): Long, K. R., DeYoung, J. H., Jr., and Ludington, S. D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States: Geological Survey Open-File Report 98-206, pt. B.

Reference (Deposit): Patton, H. B., Hoskin, A. J., and Butler, G. M., 1912, Geology and ore deposits of the Alma district, Park County, Colorado: Colorado Geological Survey Bulletin 3, 284 p.

Reference (Deposit): Singewald, Q. D., and Butler, B. S., 1941, Ore deposits in the vicinity of the London fault of Colorado: U.S. Geological Survey Bulletin 911, 74 p.

Reference (Deposit): Vanderwilt, J.W., 1947, Mineral resources of Colorado: State of Colorado Mineral Resources Board, 547 p.

Reference (Deposit): MINE MAP REPO #402005 #402201 #402202.

Reference (Deposit): MILS WITH CURRENT MSHA SHEET, 3-80.

Reference (Deposit): THE MINING RECORD, V98, #23, AUG. 26, 1987, P12., "BOULDER GOLD EXERCISES OPTION FOR PRODUCTION AT LONDON MINE."

Colorado Mining Photos

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