Klondike Mountain, Republic District, Ferry County, Washington, USA |
(Au, Ag)- Occurs as mm-scale grains typically associated with naumannite. | |
Ag2Se- Occurs as fine dark gray grains and as a major component of the ginguro bands (high-grade mm- to cm-scale dark gray layers found within the ore rock). |
ELECTRUM, NAUMANNITE, QUARTZ (Var: Chalcedony) |
Banded Au-Ag ore specimen with QUARTZ (Var: Chalcedony), NAUMANNITE |
ELECTRUM, NAUMANNITE, QUARTZ (Var: Chalcedony) |
ELECTRUM, NAUMANNITE |
ELECTRUM |
Fifarek, Richard H., Devli, Barry D., and Tschauder, Jr. Richard J., 1996, Au-Ag mineralization at the Golden Promise Deposit, Republic District, Washington: Relation to graben development and hot spring processes, in Coyner, A.R., and Fahey P.L., eds., Geology and Ore Deposits of the American Cordillera: Geological Society of Nevada Symposium Proceesings, Reno/Sparks, Nevada, April 1995, p. 1063-1088. |