Search results
Results from the WOW.Com Content Network
The contracts to explore for manganese nodules are typically for areas up to 75,000 square kilometres (29,000 sq mi), but the total area affected by the extractions is much greater. The extent of physically disturbed seabed area in one mine contract area only can be assumed to be between 200 and 600 square kilometres (77 and 232 sq mi) each ...
A 2017 study found 34 novel species in the area. Xenophyophores are highly sensitive to human disturbances, such that mining may adversely affect them. They play a keystone role in benthic ecosystems such that their removal could amplify ecological consequences. [16] The nodules are considered "critical for food web integrity". [17]
Polymetallic nodules on the deep seabed in the CCZ Example of manganese nodule that can be found on the sea floor. Polymetallic nodules are found at depths of 4–6 km (2.5–3.7 mi) in all major oceans, but also in shallow waters like the Baltic Sea and in freshwater lakes. [23] [24] They are the most readily minable type of deep sea ore. [25]
[68] [69] These resources, also called manganese nodules, contain varying amounts of manganese, cobalt, copper and nickel. They occur as potato-sized lumps scattered about on the surface of the ocean floor, mainly in the central Pacific Ocean in the Clarion–Clipperton zone but with some deposits in the Indian Ocean.
Contracts to explore for manganese nodules are typically only for areas up to 75,000km 2, but the total area affected is estimated to be between 200 and 600km 2 impacting a much larger marine ecosystem. [24] These mining vehicles emit plumes of sediment which would transport sediment to a greater distance from the site. [24]
This page was last edited on 17 December 2012, at 07:09 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Nodule is also used for widely scattered concretionary lumps of manganese, cobalt, iron, and nickel found on the floors of the world's oceans. This is especially true of manganese nodules. Manganese and phosphorite nodules form on the seafloor and are syndepositional in origin. Thus, technically speaking, they are concretions instead of nodules ...
An abundant resource of manganese in the form of Mn nodules found on the ocean floor. [85] [86] These nodules, which are composed of 29% manganese, [87] are located along the ocean floor and the potential impact of mining these nodules is being researched. Physical, chemical, and biological environmental impacts can occur due to this nodule ...