Electron Microscopic Study of Manganese Minerals in the Polymetallic Nodules from the Central Pacific Ocean  

作　　者：Xiao Xuqi Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing Guo Shiqin China Ocean Mineral Researches and Development Association (COMRA), Beijing Jiang Minxi 

出　　处：《Acta Geologica Sinica(English Edition)》1993年第1期33-41,123-124,共11页地质学报（英文版）

摘　　要：Manganese minerals in the polymetallic nodules from the Central Pacific Ocean were studied using electron microscopy. The principal Mn minerals, being vernadite and todorokite, exhibit different electron diffraction patterns and morphological features. According to its morphological feature, todorokite shows three phases: fibrous, lamellar and lath-shaped. Both vernadite and todorokite are authigenic minerals. While vernadite was mainly precipitated directly from the relevant solution by microbiological oxidation, todorokite was separated from the solution chemically without the help of microbe. Hence, these two minerals show a close genetic relation.Manganese minerals in the polymetallic nodules from the Central Pacific Ocean were studied using electron microscopy. The principal Mn minerals, being vernadite and todorokite, exhibit different electron diffraction patterns and morphological features. According to its morphological feature, todorokite shows three phases: fibrous, lamellar and lath-shaped. Both vernadite and todorokite are authigenic minerals. While vernadite was mainly precipitated directly from the relevant solution by microbiological oxidation, todorokite was separated from the solution chemically without the help of microbe. Hence, these two minerals show a close genetic relation.

关 键 词：electron microscope polymetallic nodules vernadite TODOROKITE 

分 类 号：P5[天文地球—地质学]