| Growth ages of ferromanganese crusts from the western and central Pacific： Comparison between nannofossil analysis and ^10Be dating |
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| 作者姓名： | CHENG Zhenbo SHI Xuefa WU Yonghua SU Xin LI Xiaoyan WANG Kunshan YANG Yongliang GE Shulan JU Xiaohua SHI Fengdeng M. Hiroyuki |
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| 作者单位： | Micro Analysis |
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| 摘 要： | Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma.
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| 关 键 词： | 太平洋中西部 铁锰结壳 微化石分析 生长年代 10Be测年 |
| 收稿时间： | 2006-05-19 |
| 修稿时间： | 2006-05-192006-07-20 |
Growth ages of ferromanganese crusts from the western and central pacific: Comparison between nannofossil analysis and 10Be dating |
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| CHENG Zhenbo SHI Xuefa WU Yonghua SU Xin LI Xiaoyan WANG Kunshan YANG Yongliang GE Shulan JU Xiaohua SHI Fengdeng M. Hiroyuki.Growth ages of ferromanganese crusts from the western and central pacific: Comparison between nannofossil analysis and 10Be dating[J].Chinese Science Bulletin,2006,51(24):3035-3040. |
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| Authors: | Zhenbo Cheng Xuefa Shi Yonghua Wu Xin Su Xiaoyan Li Kunshan Wang Yongliang Yang Shulan Ge Xiaohua Ju Fengdeng Shi M Hiroyuki |
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| Institution: | (1) Key Laboratory of Marine Sedimentology and Environmental Geology, State Oceanic Administration, Qingdao, 266061, China;(2) Key Laboratory of Lithospheric Tectonic Deep-Level Process, China University of Geosciences, Beijing, 100083, China;(3) National Research Center for Geoanalysis, Chinese Academy of Geological Sciences, Beijing, 100037, China;(4) Micro Analysis Laboratory, Tandem Accelerator, University of Tokyo, Tokyo 113-0032, Japan |
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| Abstract: | Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma. |
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| Keywords: | ferromanganese crusts nannofossil 10Be dating growth ages growth rates |
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