地学前缘 ›› 2020, Vol. 27 ›› Issue (1): 244-259.DOI: 10.13745/j.esf.2020.1.26

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从东海和南海北部盆地群演化探讨日本大陆板块的形成过程

梁光河   

  1. 1. 中国科学院 地质与地球物理研究所; 中国科学院矿产资源研究重点实验室, 北京 100029
    2. 中国科学院 地球科学研究院, 北京 100029
    3. 中国科学院大学, 北京 100049
  • 收稿日期:2019-03-20 修回日期:2019-09-05 出版日期:2020-01-20 发布日期:2020-01-20
  • 作者简介:梁光河(1965—),男,副研究员,地球物理学专业,主要从事矿产资源勘查、大地构造和地震成因机制研究。E-mail: lgh@mail.iggcas.ac.cn
  • 基金资助:

    国家重点研究计划“深地资源勘查开采”重点专项项目“北方增生造山成矿系统的深部结构与成矿过程”(2017YFC0601204);第二次青藏高原综合科学考察研究(2019QZKK0806)

Detailed study of the formation of Japanese islands based on tectonic evolution of basins in the East China Sea and Northern South China Sea.

LIANG Guanghe   

  1. 1. Institute of Geology and Geophysics, Chinese Academy of Sciences; Key Laboratory of Mineral Resources Research, Chinese Academy of Sciences, Beijing 100029, China
    2. Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-03-20 Revised:2019-09-05 Online:2020-01-20 Published:2020-01-20

摘要:

日本列岛是位于欧亚东缘和西太平洋过渡带上的大陆板块,其来源和成因机制得到了广泛研究,传统上认为其成因是由太平洋俯冲形成的沟弧盆体系的一部分,但仍存在诸多争议。基于地形地貌、地震勘探剖面和盆地构造演化史恢复、古地磁测量和古生物等诸多证据,将南海北部的珠江口盆地、台西南盆地和东海盆地及冲绳海槽的构造迁移进行统一的系统分析,研究结果表明日本大陆板块在新生代由两个区域分别漂移而来。北海道来自赤道附近,而本州、四国和九州来自华南大陆边缘。其成因动力机制与欧亚板块从北大西洋的裂解东漂和印度与欧亚碰撞密切相关,在这个过程中,位于欧亚板块东缘的日本三岛首先发生了裂解,之后发生了漂移。新的大陆漂移模型合理地解释了沟弧盆体系的形成机制和过程,说明了弧状岛弧的成因机制,也给出了所形成的盆地内油气富集的规律。本研究为大陆漂移模式提供了一个新的动力机制。

关键词: 日本成因, 大陆漂移, 动力机制, 东海盆地, 珠江口盆地

Abstract:

The Japanese islands are located between the eastern edge of Asia and the western Pacific. The source and genetic mechanism of their formation have been extensively studied, but controversies still remain. Japan is traditionally considered to be part of the trench arc basin system formed by the Pacific subduction, but this notion contradicts geological observations. Based on topographical features, seismic exploration profiles, restoration of basin tectonic evolution history, paleomagnetic measurements and paleontological evidence, we systematically analyzed the tectonic migration of the Pearl River Mouth Basin, the Taiwan Southwestern Basin, the East China Sea Basin and the Okinawa Trough. The results showed that the Japanese continental plate drifted from two regions in the Cenozoic: Hokkaido came from the equator; and Honshu, Shikoku and Kyushu came from the edge of the South China continent. The genetic mechanism is closely related to the eastward drifting of the Eurasian plate splitting from the North Atlantic, and India’s collision with the Eurasian plate. In the process, the Japanese islands on the eastern edge of the Eurasian plate first cracked, then drifted. This new continental drift model can reasonably explain the formation mechanism and process of the trench arc basin system. It can also explain the formation mechanisms of the arcshaped island arc and the rich oil and gas deposits in the basin. This study provides a new dynamic mechanism for the continental drift model.

Key words: genesis of Japan, continental drift, dynamic mechanism, East China Sea Basin, Pearl River Mouth Basin

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