| 末次冰消期以来东海内陆架沉积物磁化率的环境意义 |
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| 引用本文： | 徐方建,李安春,李铁刚,孟庆勇,陈世悦,林承焰,操应长.末次冰消期以来东海内陆架沉积物磁化率的环境意义[J].海洋学报,2011,33(1):91-97. |
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| 作者姓名： | 徐方建 李安春 李铁刚 孟庆勇 陈世悦 林承焰 操应长 |
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| 作者单位： | 1.中国石油大学(华东) 地球资源与信息学院, 山东 青岛 266555;中国科学院 海洋研究所 海洋地质与环境重点实验室, 山东 青岛 266071;中国石油大学 油藏地质山东省重点实验室, 山东 东营 257061 |
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| 基金项目： | 山东省自然科学基金(ZR2010DL009);中央高校基本科研业务费专项资金(10CX04004A);中国科学院海洋研究所海洋地质与环境重点实验室开放基金(MGE2010KG02);国家自然科学基金 (40776030);中国石油大学博士基金项目(Y0901036)。 |
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| 摘 要： | 对末次冰消期以来东海内陆架沉积物磁化率的影响因素及其蕴含的古环境信息进行了探讨.对位于浙闽沿岸泥质沉积中心附近的EC2005孔沉积物磁化率、岩性、粒度、常量元素、矿物以及AMS<'14>C测年数据进行了综合分析,得出以下主要结论:EC2005孔沉积物磁化率的变化受多种因素的制约,不同层位的主要控制因素不同,60.20～...
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| 关 键 词： | 东海内陆架 末次冰消期 磁化率 沉积环境 成岩作用 |
| 收稿时间： | 2010/2/22 0:00:00 |
The paleoenvironmental significance of magnetic susceptibility of sediments on the East China Sea inner shelf since the last deglaciation |
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| XU Fang-jian,LI An-chun,LI Tie-gang,MENG Qing-yong,CHEN Shi-yue,LIN Cheng-yan and CAO Ying-chang.The paleoenvironmental significance of magnetic susceptibility of sediments on the East China Sea inner shelf since the last deglaciation[J].Acta Oceanologica Sinica (in Chinese),2011,33(1):91-97. |
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| Authors: | XU Fang-jian LI An-chun LI Tie-gang MENG Qing-yong CHEN Shi-yue LIN Cheng-yan and CAO Ying-chang |
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| Affiliation: | Faculty of Geo-resources and Information, China University of Petroleum(East China), Qingdao 266555, China;Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Shan;Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Faculty of Geo-resources and Information, China University of Petroleum(East China), Qingdao 266555, China;Faculty of Geo-resources and Information, China University of Petroleum(East China), Qingdao 266555, China;Key Laboratory of Shandong Province for Reservoir Geology, China University of Petroleum, Dongying 257061, China;Faculty of Geo-resources and Information, China University of Petroleum(East China), Qingdao 266555, China |
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| Abstract: | The paleoenvironmental significance of magnetic susceptibility (MS) and its influencing factors in the sediments on the inner shelf of the East China Sea have been discussed since the last deglaciation.On the basis of analysis on the MS, lithology, grain-size, major elements, minerals and AMS14C dating of Core EC2005 which is located in the mud depocenter near the Zhejiang-Fujian coast, main conclusions are summarized as follows. The variations of the MS are affected by many factors and the main influencing factors at different layers change significantly. The MS in core depth 60.20~28.06 m is controlled primarily by lithology, the variations in core depth 28.06~8.40 m are due to the impact of early diagenetic effects on magnetic minerals, and the MS above 8.40 m is likely to be affected by human activities. The decrease of the MS at the bottom of 60.20~41.00 m corresponds to the climate warming and wetting trend, lake expansion that occurred during this period. This view is inconsistent with the previous studies that the high MS value corresponds to the warm and humid climate conditions. It is indicated climatic significance differs in different study areas. Therefore, caution must be exercised when the MS is adopted as climate proxies. Its significance should be discussed in detail. |
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| Keywords: | inner shelf of the East China Sea last deglaciation magnetic susceptibility sedimentary environment diagenesis |
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