Final answer:
Volcanic vents are a key source of mineral deposits on the seafloor, specifically forming VMS deposits.
Explanation:
Volcanic vents are one source of mineral deposits on the seafloor. These vents, also known as hydrothermal vents, release hot, mineral-rich water into the ocean, forming deposits of minerals like sulphides. These deposits are known as volcanogenic massive sulphide (VMS) deposits.
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