In-situ XAS measurements as a new approach to probe metal extraction from magmas: Distribution and speciation of Cu in fluid+melt systems

The transition to a zero-emission economy requires the access to a growing amount of metals as Cu to construct new energy systems and connect them together. In such context, a better understanding of ore-forming processes is necessary to explore for new resources and develop more sustainable mining operations.
Here, we propose to investigate how and to which extent fluids released by magma degassing can concentrate Cu to later form porphyry and epithermal ore deposits. In particular, we will conduct in-situ HERFD-XAS measurements in a transparent autoclave to determine the speciation and distribution of Cu between magmatic fluids and rhyolitic, dacitic and andesitic melts to 1000C and 1kbar.