Description
Tenneco Minerals Co.
Commodities
PrimaryGold
SecondarySilver
TertiaryMercury, Thallium, Antimony, Barium-Barite
Commodity typeB
Deposit
Model172: Carbonate-hosted Au-Ag
Deposit sizeS
Ore controlNighthawk Fault Strikes Northeast, Dips 80 Degrees West And Serves As The Primary Conduit For Mineralizing Fluids. Ore Is Thickest Where Nighthawk Fault Is Offset By Wnw En Echelon Faulting, A Result Of Secondary Porosity In Chainman Shale At The Fault Intersections. Joana Limestone Acted As A Porous Host Since Gold Mineralization Appears Stratabound And Closely Emulates The Fold Pattern.
Materials
GangueBarite, Hematite, Limonite, Opal
Geology
Host rockShale,Limestone · Chainman Shale;Joana Limestone
StructureLow Amplitude, Open Folds With Axes That Strike Between N-S And N15e., Nighthawk Fault.
AlterationSilicification, Jasperization, Argillization, Decarbonization. Silicification Is The Most Common Alteration Within The Orebody. Chainman Shale And Pilot Shale Are Argillized And Silicified Adjacent To Nighthawk Fault.
Economic & production
Development statusProducer
First production1989
Discovery year1986
Identification
Deposit ID10047584
MRDS IDM242961
Alternate namesEasy Junior
RegionNA
Data scoreB
Coordinates39.18104, -115.67422
References
CARDEN, J.R., 1991, THE DISCOVERY AND GEOLOGY OF THE NIGHTHAWK RIDGE DEPOSIT AT EASY JUNIOR, WHITE PINE COUNTY, NEVADA, IN GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, RAINES, G.L., ET AL, EDS., THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 665-676.NBMG, 1991, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990, P.25.