Polymetallic mineral deposits are discovered in diverse geological formations across the globe, including ancient underground sulfide ore bodies, volcanic-hosted massive sulfide deposits, and vast seafloor accumulations such as polymetallic nodules strewn across abyssal plains in regions like the Clarion-Clipperton Zone of the Pacific Ocean. These complex deposits contain rich concentrations of copper, nickel, cobalt, zinc, and rare earth elements critical for modern technology.