The Big Four Mine is a gold and silver mine located in Larimer county, Colorado at an elevation of 5,640 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
Elevation: 5,640 Feet (1,719 Meters)
Commodity: Gold, Silver
Lat, Long: 40.49583, -105.20750
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.
Big Four Mine MRDS details
Site Name
Primary: Big Four Mine
Commodity
Primary: Gold
Primary: Silver
Location
State: Colorado
County: Larimer
District: Masonville District
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: Vein
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Front Range Uplift, Cheyenne Basin
Type: L
Description: Big Thompson Anticline, Milner Mountain Fault, Fletcher Hill (Buck Horn) Fault, Masonville Anticline, Buckhorn Syncline, Masonville Stock , Redstone Fault
Alterations
Alteration Type: L
Alteration Text: Hydrothermal Montmorillonite In Fractures
Rocks
Name: Tonalite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Tonalite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Tonalite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Gangue: Montmorillonite
Comments
Comment (Workings): ONE TUNNEL DRIVEN GENERALLY NE
Comment (Location): ON HILLSIDE ABOVE BUCKHORN CREEK 0.6 MILE NNE FROM MASONVILLE.
References
Reference (Deposit): WOLFE, J.A., 1953, GEOLOGY OF THE MASONVILLE MINING DISTRICT, LARIM ER COUNTY, COLORADO: COLORADO SCHOOL OF MINES M.SC. THESIS T-789.
Reference (Deposit): BRADDOCK, W.A., AND OTHERS, 1970, GEOLOGIC MAP OF THE MASONVILLE QU ADRANGLE, LARIMER COUNTY, COLORADO: USGS MAP GQ-832.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
