南海东北部陆缘区新近纪早期反转构造特征及其动力学意义

尚继宏; 李家彪

南海东北部陆缘区新近纪早期反转构造特征及其动力学意义

国家海洋局第二海洋研究所国家海洋局海底科学重点实验室,浙江杭州,310012

基金项目: 国家重点基础发展研究计划资助项目(2007CB411704);国家自然科学基金资助项目(40676024/D0603)

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出版历程
- 收稿日期: 2008-03-03
- 修回日期: 2008-12-05

Inversion structure features and their dynamic significances in Early Neogene strata at continental margin of the northeast South China Sea

Key Laboratory of Submarine Geosciences of State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration;Hangzhou 310012, China

摘要

摘要: 通过深入分析"九七三"项目所获取的高分辨率多道地震剖面,结合区域钻井资料,探讨了新生代以来南海东北部陆缘所历经的新生代早期张裂、中新世晚期阶段性挤压及上新世以来的稳定热沉降等复杂构造运动;张裂背景下的南海东北部陆缘在中新统中部、下部出现的背斜、逆断层等典型压性反转构造,凸现了南海东北部陆缘在晚中新世发生的阶段性挤压构造运动;分析表明,此构造活动是东沙运动在台西南海域的表现,其动力来源同菲律宾海板块的北西向运动有关。
- 南海东北部陆缘 /
- 马尼拉俯冲带 /
- 背斜 /
- 褶皱 /
- 挤压 /
- 不整合面
Abstract: Combing with regional well-log data,the complicated tectonic movements were explored atcontinental margin of the northeast South China Sea(SCS) such as rifting at Early Cenozoic,phasic extrusion at Late Miocene and stable thermal sedimentation after Pliocene by analy zing high resolution multi-channel seismic profiles acquired in the national "973" project.Therein,the typical extruding inversion structures such as anticlines and reversed faults existing at Mid-Lower Miocene strat a especially in back of to tally rifting evolutionary conditions manifested the phasic extruding tectonic movement occurred at about Late Miocene in the nort heast SCS.Analyzed results show that the inversion structure is the external performance of Dong sha movement.And its dynamic origin is related to the northwest movement of Philippine Sea Plate.
- continentalmarg in of northeast SCS /
- Manila subducting zone /
- anticline /
- fold /
- extrusion /
- unconformity

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参考文献(30)

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