东海内陆架泥质区百年来黏土矿物组成变化及其环境意义

王亮; 范德江; 李巍然; 张喜林; 陈彬; 田元

doi:10.3969/j.issn.0253-4193.2015.05.009

东海内陆架泥质区百年来黏土矿物组成变化及其环境意义

doi: 10.3969/j.issn.0253-4193.2015.05.009

1.
中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室, 山东青岛 266100;国家海洋局第三海洋研究所, 福建厦门 361005
2.
中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室, 山东青岛 266100
3.
中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室, 山东青岛 266100;国土资源部青岛海洋地质研究所, 山东青岛 266071

基金项目: 国家自然科学基金项目(41376055,41030856);国家重大基础研究发展计划项目(2010CB951202)。

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出版历程
- 收稿日期: 2013-12-25
- 修回日期: 2014-06-05

The variation of clay minerals contents on the inner shelf of the East China Sea in the last one hundred years and its environmental implication

1.
Key Lab of Submarine Geosciences and Technology in the Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
Key Lab of Submarine Geosciences and Technology in the Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
3.
Key Lab of Submarine Geosciences and Technology in the Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;Qingdao Institute of Marine Geology, Ministry of Land and Resources, Qingdao 266071, China

摘要

摘要: 东海内陆架泥质区是东海现代沉积的"汇",其中黏土组分是泥质区沉积物的重要组成部分。沉积物中黏土矿物组合是反映沉积区物质来源和搬运动力状况的良好指标。本文利用XRD方法分析了东海内陆架泥质区两根沉积物岩心中黏土矿物组成和含量变化,结合放射性年代标定,揭示了近百年来黏土矿物组成的演变特征,探讨了黏土矿物的来源及其含量变化的制约因素。结果表明:东海内陆架泥质区沉积物以长江来源物质为主,受黄河及瓯江等河流物质的影响;近百年来内陆架泥质区黏土矿物组合发生显著阶段性变化,它们是东亚季风强弱波动和长江入海悬沙减少的共同作用的结果。
- 东海内陆架 /
- 黏土矿物 /
- 物源 /
- 东亚季风 /
- 长江输沙
Abstract: The modern depocenter in the East China Sea is the mud area on the inner shelf,and the clay fraction of the sediments in the area is the main component. In the study of sedimentology,the clay minerals assemblage was widely used as an indicator of provenance and transportation of particulates. In this study,we used the method of XRD to study the variation of clay mineral contents in two gravity cores collected from the mud area. The clay minerals,together with the analysis of grain size and radioactive dating on the samples,have been used to discuss their environmental implications. The result shows that sediments in the mud area of East China Sea are mainly derived from the supply of Changjiang River,and contain a little from the Huanghe River and Oujiang River. And,clay mineral records have exhibited significant changes in the last one hundred years,which may be influenced by the fluctuations of East Asian Monsoon and the decreasing of sediment discharge of the Changjiang River.
- inner shelf in the East China Sea /
- clay minerals /
- provenance /
- East Asian Monsoon /
- sediment discharge of the Changjiang River

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