1982 Volume 32 Issue 171 Pages 25-33
Kuroko-type massive sulfide deposits exhibit similarities to certain epigenetic polymetallic Cordilleran deposits in base metal ratios, paragenesis and time-space association with felsic magmatism. In addition, the transport and deposition of Kuroko-type ores occurs within seawater-dominated convective systems.
Consideration of empirical data from the Taupo Volcanic Zone, New Zealand indicates strong similarities to the general setting of Kuroko ore deposition, and implies large volumes of intrusive magma to provide the necessary heatflux.
The metal content of certain postmagmatic fluids and δD constraints on Kuroko-type ore fluids suggest a model for Kuroko-type ore genesis in which host-rock leaching is not the major source of the metals involved. The preferred model envisages a magmatic source for the bulk of the metals in Kuroko-type ores, with the overlying convective systems acting as focussing mechanisms for ore fluid discharge and as contributors of reduced sulfur for metal sulfide deposition.
