Commodities
PrimarySilver, Gold
Commodity typeM
Deposit
Model150: Epithermal vein, Comstock
Deposit sizeS
WorkingsSurface/Underground
Ore controlPrincipal Orebody In Brecciated Area Between Two North-Striking Listric Normal Faults At Their Intersection With The Ne-Striking Montgomery-Shoshone Fault. Ore Is Typically In Quartz-Calcite Veins, Along Listric Normal Faults And Tear Faults, And Along Hanging Wall And Footwall Stockworks. The Stockwork Ore Is Controlled By Brittlely Deformed Rocks.
Materials
Ore mineralsCerargyrite, Gold
GangueCalcite, Kaolinite, Limonite, Pyrite
Geology
Host rockTuff,Rhyolite
StructureDetachment Faulting., Ore Occurs In Part Along The Ne-Striking Montgomery-Shoshone Fault. This Fault Has An Apparent Normal Displacement Of 3,500 Ft.
Tectonic settingWithin Timber Mountain Caldera Complex And Bare Mountain-Bullfrog Hills Metamorphic Core Complex.
AlterationLocally Strong Silicification As Quartz Flooding; Some Argillization And Alunite Along Shears.
Economic & production
Development statusProducer
Production years1904-1911, 1989- PRESENT (11/91)
First production1905
Discovery year1904
Identification
Deposit ID10044475
MRDS IDM231918
Alternate namesShoshone-Polaris MinePolaris Mine, Polaris Vein, St. Joe-Bullfrog Mine
RegionNA
Data scoreA
Coordinates36.91329, -116.80922
References
RANSOME, F.L., ET AL, 1910, GEOLOGY AND ORE DEPOSITS OF THE BULLFROG DISTRICT: USGS BULL. 407, P. 104-111.KRAL, V.E., 1951, MINERAL RESOURCES OF NYE CO.: NBMG BULL. 50, P. 32-34.BLM, 1988, PUBLIC SCOPING DOCUMENT FOR PROPOSED BULLFROG/MONTGOMERY-SHOSHONE PROJECT.TINGLEY, J.V., 1988, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS.NBMG, 1988, THE NEVADA MINERAL INDUSTRY 1987, NBMG SPECIAL PUBLICATION MI-1987.JORGENSEN, D.K., 1987, GEOLOGY OF THE MONTGOMERY-SHOSHONE GOLD DEPOSIT, NYE CO., NV: IN GSN SYMPOSIUM FIELD TRIP GUIDEBOOK.JORGENSEN, D.K., ET AL, 1989, GEOLOGY, ALTERATION AND MINERALOGY OF THE BULLFROG DEPOSIT, SOCIETY OF MINING ENGINEERSREPRINT NUMBER 89-135.NBMG, 1994, MI-1993JORGENSEN, D.K., ET AL, 1989, GEOLOGY, ALTERATION AND MINERALOGY OF THE BULLFROG DEPOSIT, SIETY OF MINING ENGINEERS PREPRINT NUMBER 89-135.BLM, 1988, PUBLIC SCOPING DOCUMENT FOR PROPOSED BULLFROG/MONTGOMERY-SHOSHONE PROJECT. NBMG MI-1993