| 伶仃洋南部断裂构造特征 |
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| 引用本文： | 李官保,刘保华,吴金龙,李西双,韩国忠.伶仃洋南部断裂构造特征[J].海洋科学进展,2006,24(3):320-328. |
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| 作者姓名： | 李官保 刘保华 吴金龙 李西双 韩国忠 |
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| 作者单位： | 国家海洋局,第一海洋研究所,山东,青岛,266061;海洋沉积与环境地质国家海洋局重点实验室,山东,青岛,266061 |
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| 摘 要： | 利用综合地球物理调查资料研究了伶仃洋南部断裂构造的位置、延伸方向和产状特征。结果表明,在伶仃洋南部的断裂是陆域断裂在海域的延伸,以基岩断裂为主,少数断裂影响到第四系沉积物,并表现出分段活动性。海域NE—ENE向断裂与两侧陆域的NE—ENE向断裂连接在一起,构成一条完整的NE—ENE向断裂构造体系。NW向断裂活动时代晚于NE—ENE向断裂,其右行走滑运动将NE—ENE向断裂截切和错移。形成这一构造格局的主要动力来自新生代以来南海的拉张作用以及澳洲板块南北向的推挤作用。
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| 关 键 词： | 伶仃洋 断裂构造 构造应力场 |
| 文章编号： | 1671-6647(2006)03-0320-09 |
| 收稿时间： | 2005-08-28 |
| 修稿时间： | 2005年8月28日 |
Fault Structure Features in the Southern Lingdingyang Sea Area |
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| LI Guan-bao,LIU Bao-hua,WU Jin-long,LI Xi-shuang,HAN Guo-zhong.Fault Structure Features in the Southern Lingdingyang Sea Area[J].Advances in Marine Science,2006,24(3):320-328. |
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| Authors: | LI Guan-bao LIU Bao-hua WU Jin-long LI Xi-shuang HAN Guo-zhong |
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| Institution: | 1. First Institute of Oceanography, SOA, Qingdao 266061, China; 2. Key Lab of Marine Sedimentology and Environmental Geology, SO.A, Qingdao 266061, China |
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| Abstract: | In this paper,the position,extending direction and attitude features of fault structures in the southern Lingdingyang sea area are studied by using the comprehensive geophysical survey data.It is shown from the study results that the faults in the Lingdingyang sea area are the marine extensions of land faults,are mainly baserock faults,and a few faults have affected the Quaternary sediment to show the piecewise activity.The marine NE-ENE trending faults and the lateral land NE-ENE trending faults join together to form an integrated NE-ENE trending fault structure system.The active ages of NW trending faults are later than those of NE-ENE trending faults,and the right lateral strike slip movements of NW trending faults cut the NE-ENE trending faults to cause their dislocations.The main driving forces for generating the fault structure pattern are the seafloor spreading of the South China Sea and the northward subduction of the Australian Plate. |
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| Keywords: | Lingdingyang Sea area fault structure structural stress field |
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