The Kentucky Derby Mine is a copper, gold, and silver mine located in Albany county, Wyoming at an elevation of 9,301 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: 9,301 Feet (2,835 Meters)
Commodity: Copper, Gold, Silver
Lat, Long: 41.28611, -106.17944
Map: View on Google Maps
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Mine Description
The Kentucky Derby workings are situated in the shear zone along upper Middle Fork near the waterfall which marks an abrupt change in stream flow direction. A short crosscut penetrates strongly shattered and sulphide enriched, dark, dense shear zone tectonites. The mineralized zone has been appreciably oxidized and the sulphide masses are characteristically coated with films of limonite and alum. The platinum group metals osmium, palladium, iridium, and platinum along with gold have been reported from these ores. NRRI assays of grab samples collected from the adit show the presence of copper, gold, and silver, but no platinum group metals were recognized.
Source: The Centennial Ridge Gold-Platinum District, Albany County, Wyoming, 1968. The Geological Survey of Wyoming.
Kentucky Derby Mine MRDS details
Site Name
Primary: Kentucky Derby Mine
Secondary: Centennial Ridge District
Commodity
Primary: Copper
Primary: Gold
Primary: Silver
Secondary: Iridium
Secondary: Osmium
Secondary: Palladium
Secondary: Platinum
Location
State: Wyoming
County: Albany
District: Centennial Ridge District
Land Status
Land ownership: National Forest
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
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: VEINS
Structure
Type: R
Description: Mullen Creek-Nash Fork Shear Zone
Type: L
Description: Shear Zones
Alterations
Alteration Type: L
Alteration Text: Mineralized Zone Has Been Oxidized
Rocks
Name: Tectonite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Tectonite
Role: Host
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Analytical Data
Analytical Data: AU=TR, AG=0.69 PPM, IR=TR, PD=TR, OS=TR, PT=0.11 PPM. PT=3.5 PPM IN ROCK SAMPLE (ALL VALUES CONVERTED TO PPM FROM OZ/TON)
Materials
Ore: Chrysocolla
Ore: Malachite
Ore: Pyrite
Ore: Gold
Ore: Chalcopyrite
Gangue: Limonite
Comments
Comment (Deposit): ORE OCCURS IN SULFIDE-RICH ZONES; UNPUBLISHED MODEL NAME: NEW RAMBLER CU-AU-PGE.
Comment (Production): NO PRODUCTION FIGURES AVAILABLE; SMALL PRODUCTION PRESUMED
Comment (Workings): SHORT CROSSCUTS
Comment (Deposit): "The Kentucky Derby workings are situated in the shear zone along upper Middle Fork near the waterfall which marks an abrupt change in stream flow direction. A short crosscut penetrates strongly shattered and sulphide enriched, dark, dense shear zone tectonites. The minerized zone has been appreciably oxidized and the sulphide masses are characteristically coated with films of limonite and alum. The platinum group metals osmium, palladium, iridium, and platinum along with gold have been reported from these ores (see Table 1). NRRI assays of grab samples collected from the adit show the presence of copper, gold, and silver, but no platinum group metals were recognized." (McCallum, 1968, p. 10)
References
Reference (Deposit): HAUSEL, W.D., 1989, THE GEOLOGY OF WYOMING'S PRECIOUS METAL LODE AND PLACER DEPOSITS: GEOLOGICAL SURVEY OF WYOMING BULLETIN 68, P. 99.
Pages: p. 99.
Reference (Deposit): HAUSEL, 1980, GOLD DISTRICTS OF WYOMING: GEOLOGICAL SURVEY OF WYOMING REPORT OF INVESTIGATIONS 23, P. 36.
Pages: p. 36.
Reference (Deposit): MCCALLUM, M.E., 1968, THE CENTENNIAL RIDGE GOLD-PLATINUM DISTRICT, ALBANY COUNTY, WYOMING: GEOLOGICAL SURVEY OF WYOMING PRELIMINARY REPORT 7, P. 9, 10.
Pages: p. 10, pl. 1.
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