Submarine massive sulfide deposits are formed by submarine hydrothermal activity. "Large seafloor massive sulfide deposits" do not need to be modified, as other literatures express.
The seafloor block sulphide deposits are formed in the hydrothermal activity of the seafloor. "large seafloor massive sulfide deposits" does not need to be modified, as other literature says.
Seafloor massive sulfide deposits are formed in seafloor hydrothermal activity. "Large seafloor massive sulfide deposits" does not need to be modified, which is expressed in other literatures.