Description
U. S. Minerals Exploration, Inc. (Usmx)
Commodities
PrimaryGold
SecondarySilver
Commodity typeM
Deposit
Model172: Carbonate-hosted Au-Ag
Deposit sizeS
WorkingsSurface
Ore controlThe North -Northeast Alignment Of Ore Zones Is Believed To Be Related To A Deep, Unrecognized "Feeder Fault", Perhaps One Coincident With The Synclinal Axis Just West Of The Ore Zones. This Is Conjectural As No Single Major Fault System Connecting The Individual Ore Shoots Has Been Identified.
Geology
Host rockLimestone · Chainman Shale
StructureNorth-Trending Folds. Green Springs Thrust Fault., Three Prominent Sets Of Nearly Vertical Faults Have Been Mapped: North-Northeast, East-Northeast, And Northwest. The North-Northeast Set Parallels The Present Range Front, A Conspicuous Topographic Lineament Which Corresponds To The Main Ore Trend, The Major Fold Axes, And The Bonanza Silver Veins Of The Treasure Hill Mine. Norhteast- And Northwest- Striking Faults Are Both Pre- And Post-Ore. Offsets On These Faults Generally Measure Only A Few Meters.
AlterationSilicification And Argillization. Silicification In The Form Of Bedding- Controlled Jasperoids Is On A District Scale And Is Not A Guide To The Proximity Of Ore. Argillization Is Structurally Controlled And Is Widespread In Both Productive And Unmineralized Areas. Within The Ore Zones, Gold Grades Are Independent Of The Intensity Of Argillization. Argillization Is Comprised Of 7a-Halloysite, Kaolinite, And Sericite. Argillization Postdates Silicification.
Economic & production
Development statusProducer
Production years1988-1990
First production1988
Discovery year1986
Identification
Deposit ID10047582
MRDS IDM242958
Alternate namesC, D, And North C Orebodies
RegionNA
Data scoreB
Coordinates39.14132, -115.55449
References
NBMG MINING DISTRICT FILE 344, NUMEROUS PRESS CLIPPINGS.SCOPING DOCUMENT FOR US MINERALS EXPLORATION CO.'S PROPOSED GREEN SPRINGS MINE DEVELOPMENT, NBMG FILE WHITE PINE GENERAL, ITEM 63, 1987.WILSON, W.R., COX, J.W., LANCE, D.L., 1991, GEOLOGY AND GEOCHEMISTRY OF THE GREEN SPRINGS GOLD MINE, WHITE PINE COUNTY, NEVADA, IN RAINES, G.L., ET AL, EDS., GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 687-700.NBMG, 1994, MI-1993WILSON, W.R., COX, J.W., LANCE, D.L., 1991, GEOLOGY AND GEOCHEMISTRY OF THE GREEN SPRINGS GOLD MINE, WHITE PINE COUNTY, NEVADA, IN RAINES, G.L., ET AL, EDS., GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 687-700. NBMG, 1990, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990, P. 25 NBMG MI-1993NBMG MI-1987