SC6: Porphyry copper-gold deposits in the circum-Pacific and elsewhere
SC6: Porphyry copper-gold deposits in the circum-Pacific and elsewherePresented by
This workshop will consist of two major parts. The first describes the tectonic and regional controls to copper and gold mineralization in the circum-Pacific region with a focus on the magmatic arcs of Southeast Asia, Western Pacific, Peruvian Andes and Ecuador. The relationships of mineralization to subduction-slab geometry, varying deformational styles, cross-orogen structures, heat- and fluid-flow focussing mechanisms and other controls will be discussed.
The second part of the course will present the geological setting, geochemical signature and geophysical expression of porphyry copper-(gold) systems on the district-scale and provide several global examples. This presentation will cover the key geological ingredients and physical constraints that make for productive porphyry systems. General geochemical zoning, hydrothermal alteration models and geophysical signatures will be presented. Examples from continental and island arc settings will include deposits formed from oxidized magmas in Indonesia, Ecuador and elsewhere, and more reduced magmas in Nevada, with comparisons drawn to the intrusion-related gold deposits in Alaska-Yukon. Exploration models will be discussed for porphyry deposits in different geological settings, erosion levels and weathering environments.Back
DateSaturday 6 April 2019
Time9.00am - 5.00pm