Was their specific mention of which elements would be extracted?...

Was their specific mention of which elements would be extracted? or was it deep sea mining along these lines?

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Is deep-sea mining a cure for the climate crisis or a curse?

Deep-sea mining robot Patania II begins its descent to the Pacific ocean sea floor.

Trillions of metallic nodules on the sea floor could help stop global heating, but mining them may damage ocean ecology

The nugget is a polymetallic nodule and oceanographers have discovered trillions of them litter Earth’s ocean floors. Each is rich in manganese, nickel, cobalt and copper, some of the most important ingredients for making the electric cars, wind turbines and solar panels that we need to replace the carbon-emitting lorries, power plants and factories now wrecking our climate