Deep-sea mining is the process of exploring the deep seabed and retrieving minerals like cobalt and manganese (used in things like rechargeable batteries, smartphones, and steel), as well as gold, nickel, and rare earth elements.
Private companies are designing and testing several technologies to explore and sample wide areas of the ocean floor.
However, researchers do not fully understand the consequences of deep-sea mining. These could include the release of sediment plumes that contain toxic heavy metals, which could affect ecosystems and spread to other countries on ocean currents.
Mineral deposits can be found near deep-sea hydrothermal vents.
Why This Matters
The ocean floor contains vast quantities of critical minerals vital for many applications, such as aircraft components and rechargeable batteries. Increased demand for such minerals has driven technology development for exploration and extraction from deep-sea mining. However, the long-term environmental effects from deep-sea mining are as yet unknown.
The Technology
What is it? Deep-sea mining is the process of exploring for and retrieving minerals from the deep seabed. Three types of deposits hold most of these minerals: polymetallic nodules, also called manganese nodules, which are lying on the seabed; sulfide deposits around hydrothermal vents; and ferromanganese crusts, which are rich in cobalt and manganese and line the sides of ridges and seamounts.
These sources hold a wide variety of critical minerals,...
Read Full Story: https://www.gao.gov/products/gao-22-105507
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