| 珠江口盆地成盆?成烃?成藏:代序 |
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| 引用本文： | 高阳东,张向涛,彭光荣,李三忠,索艳慧.珠江口盆地成盆?成烃?成藏:代序[J].大地构造与成矿学,2021,45(1):1-5. |
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| 作者姓名： | 高阳东 张向涛 彭光荣 李三忠 索艳慧 |
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| 作者单位： | 中海石油(中国)有限公司 深圳分公司,广东 深圳 518000;深海圈层与地球系统教育部前沿科学中心,海底科学与探测技术教育部重点实验室,中国海洋大学 海洋地球科学学院,山东 青岛 266100;青岛海洋科学与技术国家实验室 海洋矿产资源评价与探测技术功能实验室,山东 青岛 266100 |
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| 基金项目： | 国家自然科学基金项目;中海石油(中国)有限公司深圳分公司科研项目 |
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| 摘 要： | 珠江口盆地位于太平洋俯冲的东部动力系统、印度-澳大利亚板块与欧亚碰撞或新特提斯洋俯冲的西部动力系统相互作用的中间地带,因此其构造成因及南海海盆打开机制一直存在争论;且构造对南海北部陆缘盆地群的油气成藏有何作用也不甚清晰。本专辑以珠江口盆地为例,特别是以阳江东凹为精细解剖区,结合中国东部新生代盆地的研究成果,展开了以下问题讨论:(1)珠江口盆地成盆机制:是单一裂陷、多幕伸展、单次伸展-走滑,还是多幕叠合走滑模式?(2)盆地的成盆机制与洼陷的生排烃、油气成藏相关性,尤其是古近系烃源岩的形成条件与资源潜力如何?不同幕次的构造转换对"源-汇"体系和油气成藏的控制作用等;(3)南海海盆的打开方式和动力学机制探讨:是印度-澳大利亚板块与欧亚板块碰撞有关的挤出-逃逸模式、太平洋板块俯冲有关的弧后伸展模式、深部构造有关的地幔柱模式、与古南海俯冲有关的俯冲拖曳模式,还是右行右阶拉分模式?(4)中国东部近海盆地共性探讨:珠江口盆地的成盆、成藏、成烃机制是否与渤海湾盆地、东海陆架盆地具有相似性?研究结果揭示,多期走滑拉分作用对珠江口盆地形成及其油气成藏具有重要意义,也影响了南海及其周边盆地群的裂解和洋盆打开过程,其动力来源主要是太平洋俯冲动力系统。
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| 关 键 词： | 珠江口盆地 阳江东凹 南海打开 走滑拉分盆地 太平洋动力系统 |
Basin Formation,Hydrocarbon Maturation and Oil Accumulation of the Pearl River Mouth Basin: Preface |
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| GAO Yangdong,ZHANG Xiangtao,PENG Guangrong,LI Sanzhong,SUO Yanhui.Basin Formation,Hydrocarbon Maturation and Oil Accumulation of the Pearl River Mouth Basin: Preface[J].Geotectonica et Metallogenia,2021,45(1):1-5. |
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| Authors: | GAO Yangdong ZHANG Xiangtao PENG Guangrong LI Sanzhong SUO Yanhui |
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| Institution: | (Shenzhen Branch,CNOOC China Limited,Shenzhen 518000,Guangdong,China;Frontiers Science Center for Deep Ocean Multispheres and Earth System,Key Lab of Submarine Geosciences and Prospecting Techniques,MOE and College of Marine Geosciences,Ocean University of China,Qingdao 266100,Shandong,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266100,Shandong,China) |
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| Abstract: | The Pearl River Mouth Basin is located in the middle of the interaction zone between the eastern Pacific subduction dynamic system and the western dynamic system induced by the Indo-Eurasian collision or the Neo-Tethys subduction.Therefore,the tectonic origin of the basin has always been controversial,and the role of the structures on the hydrocarbon accumulation of the continental marginal basins in the northern South China Sea is not clear.It is also related to the opening mechanism of the South China Sea(SCS).Focusing on the eastern Yangjiang Sag in the Pearl River Mouth Basin and combing with the previous research on the Cenozoic basins in East China,this paper mainly discussed the following key scientific problems:1)the opening mechanism of the SCS.A single rifting or multi-stage rifting process?An extension and strike-slip or multi-stage strike-slip process?2)the relationship between basin formation and oil accumulation,especially the formation conditions and potential of the Paleogene source rocks.How did the tectonic transition between different stages control the hydrocarbon generation and accumulation?3)the opening process and geodynamics of the SCS.The Indo-Eurasian collision-related extrusion model,or the back-arc rifting model related to the westward subduction of the Pacific Plate,or the mantle plume model related to the deep tectonic process,or the slab-pull of the proto-SCS model,or the dextral strike-slip model?4)the similarity between the Cenozoic basins in East China.Is there a similarity in the basin formation and oil accumulation process among them?On the whole,it concludes that multi-stage strike-slipping-related pull-apart faulting is of great significance to hydrocarbon accumulation,and it also determines the opening mechanism of the SCS,which is mainly driven by the Pacific subduction dynamic system. |
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| Keywords: | Pearl River Mouth Basin eastern Yangjiang Sag the opening mechanism of the South China Sea strike-slip pull-apart basin the Pacific dynamic system |
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