Utah · Summit County
Past Producer

Keystone Shaft

Summit County, Utah, United States
LeadSilverZincGoldCopper
⌖ Show on mapUSGS source ↗
Commodities
PrimaryLead, Silver, Zinc
SecondaryGold
TertiaryCopper
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formTABULAR
Ore controlNortheast Striking Fissures, Limestone Beds Adjacent To Fissures
Materials
Ore mineralsChalcopyrite, Galena, Gold, Malachite, Sphalerite
GangueQuartz
Other materialsPyrite
Geology
Host rockShale,Limestone · Thaynes Formation;Ankareh Formation
Associated rockDiorite · Crescent Dike
StructureUinta-Cottonwood Arch, Sevier Overthrust Belt, Iron Hollow Syncline, Crescent Fault Zone
Tectonic settingBasin And Range-Colorado Plateau Transition Zone, Cordilleran Hinge Line
AlterationOxidation, Silicification
Economic & production
Development statusPast Producer
First production1923
Last production1926
Discovery year1875
Identification
Deposit ID10087986
MRDS IDD012015
RegionNA
Data scoreB
Coordinates40.61911, -111.54161
References
BOUTWELL, J.M., 1912, GEOLOGY AND ORE DEPOSITS OF THE PARK CITY DISTRTICT, UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 77, 231 PP.ERIKSON, A.J., (EDITOR), 1968, PARK CITY DISTRICT, UTAH: GUIDEBOOK TO THE GEOLOGY OF UTAH, NO. 22, UTAH GEOLOGICAL SOCIETY.BUTLER, B.S., LOUGHLIN, G.F., HEIKES, V.C., AND OTHERS, 1920. THE ORE DEPOSITS OF UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 111, 672 PP.BARNES, M.P., AND SIMOS, J.S., 1968, ORE DEPOSITS OF THE PARK CITY DISTRICT WITH A CONTRIBUTION ON THE MAYFLOWER LODE, IN ORE DEPOSITS OF TTHE UNITED STATES: AM. INST. METALL, ENG., V. II, P. 1102BAKER, A.A., CALKINS, F.C., CRITTENDEN, MD.D., JR., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE BRIGHTON QUADRANGLE, UTAH: U.S. GEOLOGICAL SURVEY GEOL. QUAD. MAP GQ-534BARNES & SIMOS, 1968