Cordilleran or Butte-type Veins and Replacement Bodies as a Deposit Class in Porphyry Systems

Cordilleran or Butte type polymetallic mineralization in a porphyry-related setting is known in numerous districts. Most of it is largely epithermal, is found in the upper part of the systems, cuts earlier veins with potassic and phyllic alteration assemblages, and occurs as veins, massive replacement bodies, and sulfide-cemented breccias