On some relationships between the oxide layers and the cores of deep sea manganese nodules |
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| Authors: | C Lalou E Brichet |
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| Institution: | (1) Centre des Faibles Radioactivités Laboratoire mixte CNRS-CEA, B.P. No 1, 91190 Gif sur Yvette, France |
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| Abstract: | Some manganese nodules from the Atlantic, Pacific and Indian Ocean have been studied. The structural study with Scanning Electron Microscope (SEM) as well as the mineralogical studies or leaching experiments show that the oxide layer is supported by a frame of material derived from the core, being amorphous silica when the core is made of silicates, and calcium phosphate when the core is made of calcium phosphate.It is to be concluded that, for these nodules, the most probable origin is a volcanic origin. |
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