Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"Polymetallic nodules"”.
-
Rare metal resources in polymetallic nodules from the Eastern Equatorial Pacific Ocean
… greatest interest in terms of metal resources in polymetallic nodules. The nodules are enriched (relative to crustal composition) in economically important metals such as Mn, Ni, Cu, Zn, and so-called critical metals such as Co, Rare Earth Elements and Y (REYs). This project involves the …
-
Deep-sea mining : dewatering plumes, vortex-induced vibrations and economic modelling
… issued twenty nine exploration licenses for polymetallic nodules, polymetallic sulphides and polymetallic crusts. The ISA is seeking to approve the exploitation regulations for polymetallic nodules in the next two years, but there are significant research and knowledge gaps that still have to …
-
The deepest paradox : seafloor mining and its future
… water's surface in geological formations such as polymetallic nodules, ferromanganese crusts, and seafloor massive sulfides is well-established, the biological and ecological profiles of these sites are still actively developing. As a result, the two scientific disciplines - geochemistry and …
-
POLYMETALLIC NODULE ABUNDANCE ESTIMATION USING SIDESCAN SONAR: A QUANTITATIVE APPROACH USING ARTIFICIAL NEURAL NETWORK
… Clipperton Fracture Zone (CCFZ) are pockets of Polymetallic Nodules (PMN). These PMN possess high economic potential as they are rich in minerals such as manganese, nickel, copper and rare earth elements. Quantification of such PMN coverage is important for economic feasibility studies and …
-
Sediment plumes and financial modeling in the context of deep-sea polymetallic nodule mining
Deep-sea polymetallic nodule mining commercial operations are close to becoming a reality. In recent years, research activity in the field has substantially increased, but there are yet many technical, environmental and financial challenges to be addressed. This work tackles three critical topics …