manganese nodule

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manganese nodule

n
(Geological Science) geology a small irregular concretion found on deep ocean floors having high concentrations of certain metals, esp manganese
References in periodicals archive ?
Contract notice: development of an ultrasound method for determining the density of manganese nodules
The value of the manganese nodules alone can be as high as PS40,000 per square mile.
They got their start back in the 1970s and 1980s, when it looked as if there were untold riches in manganese nodules scattered across the ocean floor.
The companies may also look back in history, to the ill-fated attempts to extract manganese nodules in the 1980s.
Today the agency's silence is called a 'Glomar response,' taking its name from the Hughes Glomar Explorer, a ship built (we now know) to recover a sunken Soviet submarine, but disguised as a private vessel for mining manganese nodules from the ocean floor.
After three years of graduate studies in theoretical physics, a feasibility study to bring manganese nodules off the bottom of the ocean led her to Seattle, where she completed a master's degree in computer science.
The greatest interest has been in abyssal manganese nodules that contain significant amounts of nickel, copper and cobalt.
Thousands of square miles of the sea floor, particularly in the Pacific, are covered by fields of walnut-sized manganese nodules containing considerable deposits of iron, copper, nickel and cobalt.
"There are great riches in manganese nodules, cobalt, and nickel.
In order to demonstrate the feasibility of the process on an industrial scale, A demonstration experiment is necessary in which 100 to 150 kg manganese nodules per hour are continuously converted over at least 72 hours.
The region is also believed to be rich in deposits of natural gas and manganese nodules, which is vital in steel production, as well as in marine resources, she said.