Description
St. Joe Minerals
Commodities
PrimaryGold, Silver, Copper, Lead, Zinc
Commodity typeM
Deposit
Deposit typeHydrothermal Stockwork
Model150: Epithermal vein, Comstock
Deposit sizeM
Orebody formTABULAR
Ore controlGold Deposition Controlled By Middle Plate Fault (Listric Normal Fault) In Upper Plate Of Bullfrog Detachment Fault And Appears To Be Related To Magmatic Activity Of The Timber Mountain Caldera Complex. Significant Mineralization In The Bullfrog District Is Confined To A 2 Mile Wide Zone Immediately North Of And Along The Trace Of The Bullfrog Detachment Fault, Indicating That Proximity To The Detachment Fault Is An Ore Control.
Materials
Ore mineralsAcanthite, Electrum, Gold, Pyrite
GangueGalena, Sphalerite, Tetrahedrite
Geology
Host rockRhyolite
Associated rockGneiss,Clastic Sedimentary Rock,Carbonate
StructureBullfrog Detachment Fault., Listric Normal Fault In The Upper Plate Of The Bullfrog Detachment Fault.
Tectonic settingWithin Timber Mountain Caldera Complex And Bare Mountain-Bullfrog Hills Metamorphic Core Complex. Also Within Walker Lane Structural Zone.
AlterationSee Comments
Economic & production
Development statusProducer
Production years1989-PRESENT (11/91)
First production1989
Identification
Deposit ID10055085
MRDS IDRE00023
RegionNA
Data scoreB
Coordinates36.89746, -116.81672
References
NOBLE, D.C., ET AL, 1991, MAGMATIC AND HYDROTHERMAL ACTIVITY, CALDERA GEOLOGY, AND REGIONAL EXTENSION IN THE WESTERN PART OF THE SOUTHWESTERN NEVADA VOLCANIC FIELD IN GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, SYMPOSIUM PROCEEDINGS, RAINES, G.L., ET AL, EDS., THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 913-934.NBMG, 1990, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990.JORGENSEN, D.K., ET AL, 1990, GEOLOGY, ALTERATION, AND MINERALOGY OF BOND GOLD'S BULLFROG DEPOSIT, SOCIETY OF MINING ENGINEERS PREPRINT NUMBER 89-135.