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    西太平洋地球动力学问题与未来大洋钻探目标

    李春峰 周多 李刚 李志康 邓永康 刘文潇 温永林 陆哲哲 章露露 李珂迪

    李春峰, 周多, 李刚, 李志康, 邓永康, 刘文潇, 温永林, 陆哲哲, 章露露, 李珂迪, 2021. 西太平洋地球动力学问题与未来大洋钻探目标. 地球科学, 46(3): 759-769. doi: 10.3799/dqkx.2020.356
    引用本文: 李春峰, 周多, 李刚, 李志康, 邓永康, 刘文潇, 温永林, 陆哲哲, 章露露, 李珂迪, 2021. 西太平洋地球动力学问题与未来大洋钻探目标. 地球科学, 46(3): 759-769. doi: 10.3799/dqkx.2020.356
    Li Chunfeng, Zhou Duo, Li Gang, Li Zhikang, Deng Yongkang, Liu Wenxiao, Wen Yonglin, Lu Zhezhe, Zhang Lulu, Li Kedi, 2021. Geodynamic Problems in the Western Pacific and Future Scientific Drill Targets. Earth Science, 46(3): 759-769. doi: 10.3799/dqkx.2020.356
    Citation: Li Chunfeng, Zhou Duo, Li Gang, Li Zhikang, Deng Yongkang, Liu Wenxiao, Wen Yonglin, Lu Zhezhe, Zhang Lulu, Li Kedi, 2021. Geodynamic Problems in the Western Pacific and Future Scientific Drill Targets. Earth Science, 46(3): 759-769. doi: 10.3799/dqkx.2020.356

    西太平洋地球动力学问题与未来大洋钻探目标

    doi: 10.3799/dqkx.2020.356
    基金项目: 

    国家自然科学基金重点项目 41776057

    国家自然科学基金重点项目 91858213

    详细信息
      作者简介:

      李春峰(1970-), 男, 教授, 从事海洋地球物理研究.ORCID: 0000-0001-6683-0427.E-mail: cfli@zju.edu.cn

    • 中图分类号: P736

    Geodynamic Problems in the Western Pacific and Future Scientific Drill Targets

    • 摘要: 西太平洋区域是全球地质构造和海陆相互作用最活动的区域,经过50多年的大洋钻探研究,人们对西太平洋弧后海底扩张成因、俯冲工厂的动力学机制、地幔演化过程、发震带、热点岩浆活动、沉积古环境等都有了深入研究和分析,但是西太平洋边缘海盆具有很大的构造多样性和复杂性,仍然有很多的科学目标和科学问题有待进一步开展研究.本文详细分析了边缘海盆的大洋岩石圈演化特殊性,原位上地幔蛇纹岩化的程度,初始俯冲与初始扩张的形成机制,海台、海山、海岭、洋脊、洋隆的属性,洋中脊水热循环活动的强度及其对大洋岩石圈演化的影响,岩石圈共轭张裂与破裂模式与机制,大洋红层与异常沉积这7个方面的科学问题,并建议就流体地球化学剖面、海山岩浆剖面、穆绍海沟与加瓜海脊、Ayu海槽、卡罗琳海岭系统、Eauripik海岭、冲绳海槽、莫霍面这8个关键具体目标开展详细的地球物理刻画并提出具有全球意义的钻探建议,为今后实现中国领导的全球大洋钻探工作提供思路.

       

    • 图  1  西太平洋地形图与大洋钻探站位分布

      修改自宋晓晓和李春峰(2016).黑色圆点为深海大洋钻探项目(DSDP,1968-1983)站位;蓝色圆点为海洋钻探计划(ODP,1985-2003)站位;玫红色圆点为国际综合大洋钻探计划(IODP,2003-2013)站位;红色圆点为目前正在进行的国际综合大洋发现计划探站位(IODP,2013-2023)

      Fig.  1.  Topographic map of the western Pacific and drill site distribution

      图  2  菲律宾海盆布格重力异常校正后的高异常值反映了由于异常动力沉降引起的过校正

      Fig.  2.  Overcorrection of Bouguer gravity anomalies in the Philippine Sea basins due to anomalous dynamic subsidence

      图  3  南海东北部区域水深(a),南海叠前深度偏移地震剖面揭示的莫霍面地震反射(b)

      图a中红色线段为图b中所显示的地震剖面位置

      Fig.  3.  Regional bathymetry of the northeastern South China Sea (a), Moho reflections (b) revealed on a depth-migrated seismic profile in the South China Sea

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