Elevation: 9,098 feet
Type: Gold, Platinum
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.