Deposit
Deposit typeVEIN/HOT SPRINGS
Deposit sizeN
Ore controlA MAJOR HYDROTHERMAL SYSTEM IN THE REPUBLIC DISTRICT PRODUCED A SERIES OF EPITHERMAL VEINS CAPPED BY HOT-SPRING (SINTER) DEPOSITS. THE HOT-SPRING DEPOSITS FORMED AT PALEOSURFACES IN THE SANPOIL VOLCANICS PRIOR TO DEPOSITION OF THE OVERLYING KLONDIKE MOUNTAIN FORMATION. THE MAJORITY OF THE RECOVERED GOLD AND SILVER WAS FROM THE EPITHERMAL VEINS. THE VEINS EXHIBIT FEATURES INDICATIVE OF EPISODIC VEIN SEALING AND OVERPRESSURING FOLLOWED BY FLASHING AND PRECIPITATION OF PRECEOUS METALS, THUS FORMING THE CHARACTARISTIC COLORFORM BANDS. GEOMETRICALLY, ORE DEPOSITS IN THE REPUBLIC DISTRICT EXTEND FROM THE PALEOSURFACE MINERALIZATION IN HYDROTHERMALLY ALTERED ROCKS AND SINTER DOWNWARD INTO EPITHERMAL STOCKWORKS AND HYDROTHERMAL BRECCIAS, AND FARTHER DOWNWARD INTO TIGHTLY CONFINED, COMMONLY COLORFORM-BANDED VEINS (MUESSIG, 1967; TSCHAUDER, 1989).
Economic & production
Development statusPast Producer
Identification
Deposit ID60001245
MRDS IDSP00058
RegionNA
Data scoreD
Coordinates48.69875, -118.57003
References
WDGER OFR 90-18BANCROFT, HOWLAND, 1914, THE ORE DEPOSITS OF NORTHEASTERN WASHINGTON; U.S. GEOLOGICAL SURVEY BULLETIN 550, 215 P.FULL, R.P.; GRANTHAM, R.M., 1968, ORE DEPOSITS OF THE REPUBLIC MINING DISTRICT, FERRY COUNTY, WASHINGTON. IN RIDGE, J.D., EDITOR, ORE DEPOSITS OF THE UNITED STATES, 1933-1967; THE GRATON-SALES VOLUME: AMERICAN INSTITUTE OF MINING, METALLURGICAL, AND PETROLEUM ENGINEERS, V. 2, P. 1481-1494.HUNTTING, M. T., 1956, INVENTORY OF WASHINGTON MINERALS-PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, 428 P.; V. 2, 67 P.MUESSIG, SIEGFRIED, 1967, GEOLOGY OF THE REPUBLIC QUADRANGLE AND PART OF THE AENEAS QUADRANGLE, FERRY COUNTY, WASHINGTON: U.S. GEOLOGICAL SURVEY BULLETIN 1216, 135 P., 1 PL.TSCHAUDER, R.J., 1989, GOLD DEPOSITS IN NORTHERN FERRY COUNTY, WASHINGTON. IN JOSEPH, N.L. AND OTHERS; EDITORS, GEOLOGIC GUIDEBOOK FOR WASHINGTON AND ADJACENT AREAS: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES INFORMATION CIRCULAR 86, P. 241-253.UMPLEBY, J.B., 1910, GEOLOGY AND ORE DEPOSITS OF REPUBLIC MINING DISTRICT: WASHINGTON GEOLOGICAL SURVEY BULLETIN 1, 65 P.