Manganese Nodules On Ocean Floor

Manganese Nodules On The Ocean Floor Oceans Of The World Oceanography Ocean

Manganese Nodules On The Ocean Floor Oceans Of The World Oceanography Ocean

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As nodules can be found in vast quantities and contain valuable metals deposits have been identified as having economic interest.

Manganese nodules on ocean floor.

Ocean mining sites are usually around large areas of polymetallic nodules or active and extinct hydrothermal vents at 1 400 to 3 700 metres 4 600 to 12 100 ft below the ocean s surface. Manganese nodules are usually located at depths below 4000m and are composed primarily of manganese and iron and elements of economic interest including cobalt copper and nickel and make up a total of around 3 by weight margolis and burns 1976. In contrast to ore deposits on land they are thus a two dimensional resource that can theoretically be extracted with relatively little effort. Though generally composed of manganese hence the name they can also be made of iron nickel copper and other metals.

It is not economical to mine manganese nodules at present day world prices for manganese and associated metals in nodules. Manganese nodules are found scattered on the ocean floor. Across the otherworldly plains of the clarion clipperton zone some 15 000 ft below the surface of the pacific ocean are clustered manganese nodules the size of potatoes. The rare earth metal.

Manganese nodules are polymetallic rock concretions on the sea bottom formed of concentric layers of iron and manganese oxi hydroxides. This recently discovered batch located several hundred miles east of barbados is the largest yet discovered in the atlantic ocean. Polymetallic nodules also called manganese nodules are rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. These nodules occur in most oceans even in some lakes and.

Polymetallic nodules like this one made of layers of iron and manganese sit on the deep seabed. The vents create globular or massive sulfide deposits which contain valuable metals such as silver gold copper manganese cobalt and zinc. So far only a single large area of manganese nodules has been discovered here with an area comparable to that of the penrhyn basin. It is located in the central indian ocean.

Proponents of mining stress that manganese nodules and cobalt crusts are present as thin layers lying directly on the sea floor or on the flanks of seamounts.

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