| 东海盆地形成的区域地质背景与构造演化特征 |
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| 引用本文： | 赵志刚,王鹏,祁鹏,郭瑞.东海盆地形成的区域地质背景与构造演化特征[J].地球科学,2016,41(3):546-554. |
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| 作者姓名： | 赵志刚 王鹏 祁鹏 郭瑞 |
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| 作者单位： | 中海油研究总院，北京 100028 |
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| 基金项目： | 国家科技重大专项《大型油气田及煤层气开发》项目23“近海大中型油气田形成条件及勘探技术(二期)”项目2011ZX05023 |
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| 摘 要： | 东海盆地处于西太平洋俯冲带前缘，是发育在华南克拉通基底之上的，以晚白垩世-新生代沉积为主的新生代盆地.东海盆地性质是在活动大陆边缘减薄陆壳之上的，由于洋-陆俯冲消减所引起的张裂、拉伸作用而形成的弧后裂谷型盆地，是西太平洋众多“沟-弧-盆”体系的一部分.东海盆地陆架外缘隆起控制着东海盆地的演化过程，该地质单元形成于晚白垩世，是陆缘隆起和增生楔的复合体，中新世后由于菲律宾海板块的活动而解体为现今的钓鱼岛隆褶带和琉球隆起.结合对陆架外缘隆起的研究后认为，东海盆地晚白垩世以来的演化历程具有3大构造阶段，即:第一阶段，古新世-中始新世西部坳陷形成发展期；第二阶段，中始新世-渐新世东部坳陷形成发展期，其中，中晚始新世太平洋板块的转向是东、西部坳陷构造迁移的分界点；第三阶段，中新世-全新世，东海盆地进入到菲律宾板块影响时期，原先的构造格局开始分解.
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| 关 键 词： | 东海盆地 盆地类型 弧后裂谷 构造 |
| 收稿时间： | 2015-06-22 |
Regional Background and Tectonic Evolution of East China Sea Basin |
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| Abstract: | The East China Sea Basin that located in the front of the west Pacific subduction zone, is formed upon the Huanan Craton basement. The main sediment filling are from Late Cretaceous to Cenozoic. The East China Sea Basin developed on the thinned continental margin crust, is a back-arc rift basin caused by rifting and stretching that induced by ocean subduction, which is the part of the "trench-arc-basin" system in the west Pacific. The tectonic evolution was controlled by the uplift in the outer continental shelf that formed in the Late Cretaceous. The uplift is the complex of the continental margin uplift and accretionary wedge that disintegrated into Diaoyu Island fold belt and Ryukyu uplift after Miocene. Considering the study of the outer continental shelf uplift, tectonic evolution history of the East China Sea basin after Late Cretaceous can be divided into three stages: the first stage, the Paleocene to Middle Late Eocene, formation and development of the western depression; the second stage, Middle Late Eocene to Oligocene, formation and development of the eastern depression, in which the rotary of the Pacific plate boundary in the Middle Late Eocene is the demarcation point of the tectonic migration of the eastern depression and western depression; the third stage, Miocene-Holocene, impaction of the Philippine Sea Plate period, the original structure pattern of the East China Sea Basin began to decompose. |
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