Commodities
PrimaryGold
SecondarySilver
TertiarySand and Gravel, Construction
Commodity typeB
Deposit
Deposit typeReplacement
Model172: Carbonate-hosted Au-Ag
Deposit sizeL
Orebody formTABULAR
Ore controlBedding In The Lower Member Of The Etchart Limestone. Complex Tectonics, Stratigraphy And Alteration.
Materials
Ore mineralsGold
GangueAlbite, Augite, Barite, Calcite, Chlorite, Epidote, Fluorite, Kaolinite, Limonite, Pyrite, Quartz, Sericite, Tourmaline
Geology
Host rockDolomite · Etchart Formation;Etchart Formation;Etchart Formation;Etchart Formation
Associated rockDacite,Basalt · Gough'S Canyon Formation;Osgood Mountains Granodiorite
StructureReg.Struct: Roberts Mountain Thrust (Below) And The Golconda Thrust (Above), Intruded By The Mid-Cretaceous Osgood Mt. Granodiorite And Related Trachyandesite Dikes., Low Angle Unconformity Developed In The Gough'S Canyon Formation. The Chimney Creek Deposit Occurs Along A Northeasterly Range Front Lineament That Is Probably An Extension Of The Getchell Fault. Host Rocks Strike Ne, Dip 21-32 Nw.
Tectonic settingBack-Arc Thrust Belt
AlterationHydrothermal: Sericite, Kaolinite, Monite, Dickite, Alunite, Natroalunite. A Zone Of Phyllic Alteraion, 50 M Wide Around Feeder Zone, Contains Ore Grade Mineralization. Carbonate Dissolution Zones; Two Generations Of Silicification (Jasperoid); Propylitic Basalts.
Economic & production
Development statusProducer
First production1987
Discovery year1985
Identification
Deposit ID10084981
MRDS IDW700409
Alternate namesChimney Creek Prospect
RegionNA
Data scoreA
Coordinates41.27961, -117.15763
References
OSTERBERG, M. W. AND GUILBERT, J.M., 1991, GEOLOGY, WALL-ROCK ALTERATION, AND NEW EXPLORATI TECHNIQUES AT THE CHIMNEY CREEK SEDIMENT-HOSTED GOLD DEPOSITS, HUMBOLDT COUNTY, NV. GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, GSA SYMPOSIUM PROCEEDINGS, RENO, NV. P. 805-819.THE MINERAL INDUSTRY 1990; NBMG SPEC. PUB. MI-1990.STAFF, 1988, DIRECTORY OF NEVADA MINE OPERATIONS ACTIVE DURING CALENDAR YEAR 1987: NEVADA DIV. OF MINE INSPECTION, 84P.NEVADA MINING ASSOCIATION BULLETIN. OCT-NOV 1985.THE MINING RECORD, NOV 13, 1985, P. 3.RENO GAZETTE JOURNAL, NOV. 11, 1985.THE NORTHERN MINER, NOV. 11, 1985.MINE SEARCH ANNUAL, 1984-1985, BOULDER, CO: METALS ECONOMICS GROUP, V 7, P. 93-94.GEOLOGICAL SOCIETY OF NEVADA, 1987, PRECIOUS METALS SYMPOSIUM. LECTURES. ABSTRACTS.OSTERBERG, MARK, 1988, GEOLOGY OF THE CHIMNEY CREEK SEDIMENT-HOSTED GOLD DEPOSIT, OSGOOD MOUNTAINS, NEVADA (ABSTRACT): GEOLOGICAL SOCIETY OF NEVADA, V. 1, NO. 2, P. 4-6.ORAL COMMUNICATION FROM JIM DELONG, 16 JUL. 1986. GEOLOGIST FORMERLY WITH GOLD FIELDS.ITEM 1AND 2: NBMG. SPEC. PUB. MI-1990. ITEM 3: NEVADA MINING ASSOCIATION BULL. OCT-NOV 1985. ITEM 4: BONHAM, 1988. ITEM 5: OSTERBERG, 1988, P. 4.