Manganese Nodules

Some articles on manganese nodules, nodules, manganese nodule, manganese:

Natural Resource Economics - Perpetual Resources Vs. Exhaustibility - Trend Towards Perpetual Resources
... Exploration of the ocean bottom in the last fifty years revealed manganese nodules and phosphate nodules in many locations. 1978 has a new option now recover it from manganese nodules ... A Korean firm plans to start developing a manganese nodule recovery operation in 2010 the manganese nodules recovered would average 27% to 30% manganese, 1.25 ...
International Seabed Authority - Current Activities
... seabed areas in which they were authorized to explore for polymetallic nodules ... authorization to explore for polymetallic nodules, coming for the first time from private firms in developing island nations of the Pacific ... governing exploration for polymetallic nodules ...
Hydrothermal Vent - Exploitation
... The 1960s and 70s saw a great deal of activity (and expenditure) in the recovery of manganese nodules from the abyssal plains, with varying degrees of success ... Interestingly, mining of manganese nodules served as a cover story for the elaborate attempt by the CIA to raise the sunken Soviet submarine K-129, using ... Project Azorian, and the cover story of seafloor mining of manganese nodules may have served as the impetus to propel other companies to make the attempt ...
Manganese Compounds - Occurrence and Production
... See also CategoryManganese minerals Manganese makes up about 1000 ppm (0.1%) of the Earth's crust, making it the 12th most abundant element there ... Soil contains 7–9000 ppm of manganese with an average of 440 ppm ... Seawater has only 10 ppm manganese and the atmosphere contains 0.01 µg/m3 ...