Porphyry copper deposit formation in the context of transcrustal magma systems
3. Juli 2017 | Seminar
The worlds largest porphyry copper deposits (PCD) are associated with relatively oxidised, hydrous, subduction zone magmas. However, not all arc magmas give rise to PCDs. A central question, then, is under what conditions does differentiation of hydrous arc magmas optimise the generation of copper-rich fluids responsible for PCD mineralisation? Are there specific conditions of differentiation depth, redox and initial volatile (H2O, CO2) content that favour generation of Cu-rich fluids? In this seminar I will discuss differentiation of hydrous arc magmas in the context of trans-crustal magmatic mush systems, new data on the partitioning of Cu and Cl between silicate fluids and melts and numerical models of fluid release.
|Datum||3. Juli 2017|
|Referent/in||Prof. Jon Blundy, University of Bristol, UK|
|Organisator/in||Institute of Geochemistry and Petrology|