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热带海洋学报

• • 上一篇    

东印度洋爪哇板块边缘俯冲结构及其对地质灾害的影响

ZHANG Cuimei1,2, ZHANG Jie3, SUN Zhen4, DING Weiwei3, ZHANG Jiangyang1,2, QIU Ning1,2, LI Fucheng4, JIANG Feng4, ZHAO Yanghui3, CHUA Peisi5    

  1. 1.      热带海洋环境与岛礁生态全国重点实验室（中国科学院南海海洋研究所），广东 广州 510301;

    2.      边缘海与大洋地质实验室（中国科学院南海海洋研究所），广东 广州 510301;

    3.      海底科学与划界全国重点实验室（自然资源部第二海洋研究所），浙江 杭州 310012;

    4.      广州海洋地质调查局，广东 广州 511458;

    5.    中国科学院大学, 北京 100049

  • 收稿日期:2025-07-25 修回日期:2025-08-26 接受日期:2025-09-02
  • 通讯作者: 孙珍
  • 基金资助:

    国家重点研发计划项目(2023YFF0803402；2024YFB3908104)

Subduction structure and its influence on geological hazards at the Java plate margin in the eastern Indian Ocean

ZHANG Cui-mei   

  1. 1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China;

    2. Laboratory of Ocean and Marginal Sea Geology (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China;

    3. State Key Laboratory of Submarine Geosciences (Second Institute of Oceanography, Ministry of Natural Resources), Hangzhou 310012, China;

    4. Guangzhou Marine Geological Survey, Guangzhou 511458, China;

    5. University of Chinese Academy of Sciences, Beijing 100049, China

  • Received:2025-07-25 Revised:2025-08-26 Accepted:2025-09-02
  • Supported by:

    National Key Research and Development Program of China (2023YFF0803402; 2024YFB3908104)

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摘要： 作为活跃的汇聚带，巽他弧以强震、海啸和火山活动著称，而目前对东巽他弧板块边缘的关注相对较少。该研究全面梳理了爪哇东至松巴哇岛板块边缘的俯冲洋壳、海沟及增生楔沿走向的变化，探讨了俯冲板块地形地貌对上覆板块变形的控制，并揭示了俯冲作用对浅部地质灾害的影响。结果表明研究区俯冲结构具有显著的分段性，西部受Roo隆起俯冲的控制，而东部与阿尔戈深海平原俯冲相关。俯冲板块的不同海底地貌和结构导致了海沟和弧前区显著的变形差异。Roo隆起造成显著的俯冲侵蚀作用，相关增生楔发育范围小，且倾斜坡度大。深海平原俯冲对应发育宽缓的增生楔。无论海山/隆起俯冲或俯冲板块挠曲产生的正断层都可能触发地质灾害的发生。相关结论为理解俯冲增生过程、地震和海啸灾害提供了理论依据。

关键词: 海山俯冲, 地质灾害, 爪哇海沟, 俯冲带, 板块边缘

Abstract: As an active convergent margin, the Sunda Arc is renowned for intense seismic activity, tsunamis, and volcanic eruptions, yet relatively less attention has been paid to the eastern segment of the Sunda Arc. This study describes the along-strike variations of the subducting oceanic crust, trench, and accretionary wedge from eastern Java to Sumbawa Island, and investigates the control of subducting plate topography on the deformation of the overriding plate, and reveals the influence of subduction on shallow geological hazards. The results show significant segmentation of the subduction structure in the study area: the western part controlled by the subduction of the Roo Rise, while the eastern part associated with the subduction of the Argo Abyssal Plain. The distinct seafloor topography and structures of the subducting plate lead to pronounced variations of trench and forearc deformation. The subduction of the Roo Rise results in prominent subduction erosion with a narrow and steeply inclined accretionary wedge. In contrast, that of the abyssal plain corresponds to the development of a broad and gently sloping accretionary wedge. Both seamount/rise subduction and normal faulting generated by plate bending may trigger geological hazards. These findings provide a theoretical basis for understanding accretion processes of subduction zone, as well as earthquake and tsunami hazards.

Key words: Seamount subduction, geological hazards, Java trench, subduction zone, plate margin