Unknown

The Unknown is a gold, silver, and sand and gravel, construction mine located in Adams 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

Name: Unknown  

State:  Colorado

County:  Adams

Elevation:

Commodity: Gold, Silver, Sand and Gravel, Construction

Lat, Long: 39.82, -104.94778

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 Unknown

Unknown MRDS details

Site Name

Primary: Unknown


Commodity

Primary: Gold
Primary: Silver
Primary: Sand and Gravel, Construction


Location

State: Colorado
County: Adams


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Producer
Deposit Type: Placer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N


Physiography

General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Not available


Rocks

Name: Gravel
Role: Host
Age Type: Host Rock
Age Young: Holocene


Analytical Data

Not available


Materials

Ore: Silver
Ore: Sand
Ore: Gold
Ore: Gravel


Comments

Comment (Production): GOLD RECOVERED BY SLUICING IN CONJUNCTION WITH SCREENING AND WASHING OF SANDS AND GRAVELS FOR CONSTRUCTION MATERIALS.

Comment (Geology): GEOL.DESC: SANDS AND GRAVELS OF STREAMS AND LOW LYING BENCHES OF CLEAR CREEK AND ITS FLOOD PLAIN


References

Reference (Deposit): USGS MIN. RES. OF U.S., 1922-1931

Reference (Deposit): USGS ARVADA COLO AND DERBY, COLO TOPO MAPS 7 1/2 MIN, 1957

Reference (Deposit): PARKER, 1961, GOLD PLACERS OF COLO., COLO. SCH. OF MINES UNPUB. DISSERTATION

Reference (Deposit): 3A) MIN. RES. OF COLO., 1960, P.60-62

Reference (Deposit): 3B) REPTS. OF COLO. BUREAU OF MINES, 1923-24, 1928-30, 1933, 1935, 1937, 1939, 1941-43, 1947, 1949, 1961

Reference (Deposit): CONSV. DIV. COMP. DATE, 4,63


Colorado Mining Photos

Placer mines at Cripple Creek, Colorado ca. 1892

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