Study reveals oxidized sediment recycling drives postsubduction porphyry copper formation
By
Yiwei Zhou
Summary
This scientific research article investigates the mechanisms behind elevated oxidation states in postsubduction porphyry magmas that drive copper mineralization. The study presents an integrated analysis of trace elements to understand how oxidized sediment recycling contributes to porphyry copper deposit formation after subduction ceases. The research addresses a gap in understanding why postsubduction magmas maintain the high oxidation states necessary for copper transport and deposition, proposing that recycled oxidized sediments from previous subduction events play a key role.
Source
bskyStudy reveals oxidized sediment recycling drives postsubduction porphyry copper formationscience.orgKey quotes
· 3 pulledPorphyry copper deposits (PCDs), supplying ~60% of global Cu reserves, typically occur in magmatic arcs and are genetically associated with oxidized calc-alkaline arc magmas
The elevated oxidation state in these magmas enhances Cu solubility, allowing metal transport until magma ascends to the shallow crust where copper precipitates as sulfide minerals in hydrothermal system
The mechanisms driving the elevated oxidation state of postsubduction porphyry magmas and porphyry copper mineralization are still not fully understood
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