Intrusion-related gold deposits

摘要: A broad spectrum of gold mineralization styles is found in the epizonal intrusive environment, and a number these give rise to world-class deposits (Figure 6.1). Here subdivided into: (a) intrusion-hosted stock-work/disseminated both porphyry non-porphyry types, former possessing all essential geological attributes (especially multidirectional stock-works) typical copper and/or molybdenum deposits; (b) skarn non-skarn replacement carbonate wallrocks; (c) stockwork, disseminated non-carbonate (d) wallrock-hosted breccia pipes; (e) veins intrusions wallrocks. This transitional upwards volcanic-hosted, epithermal which mentioned only briefly this chapter but discussed at length by Henley (this volume).