Yankee Mine

White Pine County, Nevada, United States

GoldSilver

⌖ Show on map USGS source ↗

Commodities

PrimaryGold

SecondarySilver

Commodity typeM

Deposit

Deposit typesediment-hosted gold

Model173: Sediment-hosted Au

Deposit sizeS

Ore controlOre is controlled both structurally and stratigraphically. The 16 or so orebodies at Yankee are aligned N20W along the west flank of a NW-trending anticline. Mineralization is controlled locally by a series of near-vertical faults that trend east to northeast, or perpendicular to the anticlinal axis. Stratigraphically, the ore is contained within the basal 100 feet of the Pilot Shale, which here consists of siltstone and limestone. The lower Pilot limestone contains the highest grade material. The upper siltstones of the Pilot Shale contain very little mineralization and may have acted as an impermeable cap to the mineralizing fluids.

Materials

Ore mineralsGold, Hematite, Jarosite

GangueLimonite

Geology

Host rockSiltstone,Limestone · "Pilot Shale", "Devils Gate Limestone"

StructureOre is associated with a NW-trending anticline. Mineralization is controlled locally by a series of near-vertical faults that trend east to northeast,

AlterationHost rocks are silicified and decalcified the host rock. Decalcification is pervasive enough to form zones of up to 8-% remnant illite clay. Silicification ranges from minor to complete jasperoid formation. Mineralization is intimately associated with jasperoid formation. Intense liesegang banding is regional.

Economic & production

Development statusProducer

Production years1992 - 2004

First production1992

Last production2004

Identification

Deposit ID10310391

MRDS IDRE00280

Alternate namesLincoln Pit, Blue Pit, Gray Pit, Lee Pit, Monitor Pit, Olustee Pit, Davis Pit, Saddle Pit, West Spur Pit, East Spur Pit, West Crusher Pit, Hilltop Pit, Rebel Pit, Rifle Pit, Southeast Extension Pit, Union Gray

RegionNA

Data scoreA

Coordinates39.6779, -115.52558

References

Hitchborn and others, 1996, Geology and Gold Deposits of the Bald Mountain Mining District, White Pine County, Nevada, in Geology and Ore Deposits of the American Cordillera Symposium Proceedings, eds. A. Coyner and P. Fahey.Stout, Bill, 1996, Geologic Overview of the Yankee Mine, White Pine County, Nevada, in The Geological Society of Nevada 1996 Spring Field Trip, Geology and Gold Deposits of Eastern Nevada, GSN Special Publication No. 23.Hose, Blake, and Smith, 1976, Geology and Mineral Resources of White Pine County, Nevada, NBMG Bulletin 85.USMX, 1992, Annual Report for 1991."USMX Yankee Mine in Nevada Starts Gold Production", Skillings Mining Review, July 18, 1990.NBMG, MI-90 thru MI-02NBMG Map 91, 2nd, 3rdDEIS, 1995FEIS, 1995Amer. Mines (1991-92), 1991 thru Amer. Mines (2000), 1999Nevada Land Status Map, 1990.Nutt, C.J., Hofstra, A.H., Hart, K.S., and Mortensen, J.K., 2000, Structural setting and genesis of gold deposits in the Bald Mountain-Alligator Ridge area, east-central Nevada, in Cluer, J.K., Price, J.G., Struhsacker, E.M., Hardyman, R.F., and Morris, C.L., eds., Geology and Ore Deposits 2000: The Great Basin and Beyond: Geological Society of Nevada Symposium Proceedings, May 15-18, 2000, p. 513-537.RANDOL MINING DIRECTORY, 1994/95, U.S. MINES & MINING COMPANIES, P360.AMERICAN MINES HANDBOOK, 1996, P195.PLACER DOME INC., 1996 FORM 40-F, PP. 13-16, 21-22.RANDOL MINING DIRECTORY, 1996/97, U.S. MINES & MINING COMPANIES, P280.RANDOL MINING DIRECTORY, 1993/94, U.S. MINES & MINING COMPANIES, P295.