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Volcanogenic massive sulfide ore deposit -

Volcanogenic massive sulfide deposits, also known as VMS deposits, are a type of metal sulfide deposit, mainly copper-zinc which are associated with and created by volcanic-associated hydrothermal events in submarine environments.. These deposits are also sometimes called volcanic-hosted massive sulfide VHMS deposits. The density generally is 4500 kg/m 3.

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    Iron processing | Britannica

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