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Cenozoic tectonic jumping and implications for hydrocarbon accumulation in basins in the East Asia Continental Margin

机译：东亚大陆边缘盆地新生代构造跃变及其对油气成藏的启示

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摘要

Tectonic migration is a common geological process of basin formation and evolution. However, little is known about tectonic migration in the western Pacific margins. This paper focuses on the representative Cenozoic basins of East China and its surrounding seas in the western Pacific domain to discuss the phenomenon of tectonic jumping in Cenozoic basins, based on structural data from the Bohai Bay Basin, the South Yellow Sea Basin, the East China Sea Shelf Basin, and the South China Sea Continental Shelf Basin. The western Pacific active continental margin is the eastern margin of a global convergent system involving the Eurasian Plate, the Pacific Plate, and the Indian Plate. Under the combined effects of the India-Eurasia collision and retrogressive or roll-back subduction of the Pacific Plate, the western Pacific active continental margin had a wide basin-arc-trench system which migrated or 'jumped' eastward and further oceanward. This migration and jumping is characterized by progressive eastward younging of faulting, sedimentation, and subsidence within the basins. Owing to the tectonic migration, the geological conditions associated with hydrocarbon and gashydrate accumulation in the Cenozoic basins of East China and its adjacent seas also become progressively younger from west to east, showing eastward younging in the generation time of reservoirs, seals, traps, accumulations and preservation of hydrocarbon and gashydrate. Such a spatio-temporal distribution of Cenozoic hydrocarbon and gashydrate is significant for the oil, gas and gashydrate exploration in the East Asian Continental Margin. Finally, this study discusses the mechanism of Cenozoic intrabasinal and interbasinal tectonic migration in terms of interplate, intra-plate and underplating processes. The migration or jumping regimes of three separate or interrelated events: (1) tectonism-magmatism, (2) basin formation, and (3) hydrocarbon-gashydrate accumulation are the combined effects of the Late Mesozoic extrusion tectonics, the Cenozoic NW-directed crustal extension, and the regional far-field eastward flow of the western asthenosphere due to the India-Eurasia plate collision, accompanied by eastward jumping and roll-back of subduction zones of the Pacific Plate.
机译：构造迁移是盆地形成和演化的常见地质过程。但是，对西太平洋边缘的构造迁移知之甚少。本文以渤海湾盆地，南黄海盆地，华东地区的结构性数据为基础，重点探讨了华东地区及其西太平洋代表性海的新生代盆地，探讨了新生代盆地的构造跳跃现象。海架盆地和南海大陆架盆地。西太平洋活动大陆边缘是包括欧亚板块，太平洋板块和印度板块的全球收敛系统的东部边缘。在印度-欧亚大陆碰撞和太平洋板块的后退或后退俯冲的综合作用下，西太平洋活动大陆边缘具有宽广的盆地-弧-沟系统，向东或进一步向海迁移或“跳跃”。这种迁移和跳跃的特征是盆地内的断层，沉积和沉降逐渐向东年轻。由于构造运动，华东及其邻近海新生代盆地中与油气水合物成藏有关的地质条件也由西向东逐渐年轻化，表明储集层，海豹，圈闭，成藏时代向东年轻化并保存碳氢化合物和气体水合物。这样的时空分布对东亚大陆边缘的石油，天然气和天然气水合物勘探具有重要意义。最后，本研究从板间，板内和板下过程探讨了新生代基底内和基底间构造运动的机理。三个独立的或相互关联的事件的迁移或跳跃状态：（1）构造-岩浆作用；（2）盆地形成；（3）烃-水合物聚集是中生代挤压构造，新生代西北向地壳的综合作用印度洋和欧亚大陆板块的碰撞，以及太平洋板块的俯冲带向东跳跃和后退，使得西部软流圈的区域扩展和区域性远场东移。

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  • 来源
    《Journal of Asian earth sciences》 |2014年第1期|28-40|共13页
  • 作者

    Yanhui Suo; Sanzhong Li; Shan Yu; Ian D. Somerville; Xin Liu; Shujuan Zhao; Liming Dai;

  • 作者单位

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China,Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China;

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China,Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China;

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China,Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China;

    UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland;

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China,Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China;

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China,Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China;

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China,Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    East Asia; Tectonic migration; Plate margin; Intraplate; Interplate; Deep-seated tectonic processes; Hydrocarbon accumulation;

    机译：东亚;构造迁移;板边距;板内板间深层构造过程;碳氢化合物积累;

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