• 责任者：Ren Xiangwen (Key Laboratory of Marine Sedimentology and Environmental Geology ; First Institute of Oceanography ; State Oceanic Administration ; Qingdao 266061 ; China) ; Liu Jihua
• 刊名：Marine Geology & Quaternary Geology
• 出版年：2011
• 卷期：31(3)
• 关键词：富钴结壳 ; cobalt-rich crust ; 中太平洋 ; Central Pacific
• 页码：p.41-46
• 图表：2 illus., 2 tables, 6 refs.
• 分类号：0200
• 出版序号：673
• issnNo：ISSN0256-1492
• isbnNo：CN37-1117/P

Based on the observation of hand specimen and polished sections of Co-rich ferromanganese crusts from the Line Islands, it can be concluded that this reddish-brown detrital material can be used as a marker of a younger deposit in ferromanganese crusts. The data suggest that the Co-rich ferromanganese crust is hydrogenetic in origin, and the chemical composition of the reddish-brown detrital material is characterized by Fe, Si and Al, and a lower Mn in comparison with the Fe-Mn oxides around it. Based on the geochemical characteristics and morphology of the reddish-brown detrital material, and with reference to the high primary productivity in the area around the seamount MP2, it is supposed that the reddish-brown detrital material is most probably a kind of authigenic Fe-Si-Al colloidal precipitation from seawater younger than the Co-rich ferromanganese crusts.