Abstract

It is suggested that porphyry copper deposits and Kuroko-type massive sulfide deposits are incompatible because the former are generated beneath andesitic-dacitic stratovolcanoes, whereas the latter are precipitated during or after rhyolitic to rhyodacitic volcanism within resurgent calderas. Episodes of lithospheric tension in subduction-related arcs may favor cauldron subsidence at the expense of stratovolcano development.

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