极地研究

极地研究 ›› 2021, Vol. 33 ›› Issue (1): 1-12.DOI: 10. 13679/j.jdyj.20200033

• 研究综述 •    下一篇

晚白垩世以来白令海构造成因及大地构造演化

刘松峰1,2  杨楚鹏1,2  鞠东1  熊量莉1  李学杰1   

  1. 1自然资源部中国地质调查局广州海洋地质调查局, 广东 广州 510760;
    2南方海洋科学与工程广东省实验室(广州), 广东 广州 511458
  • 收稿日期:2020-04-08 修回日期:2020-05-27 出版日期:2021-03-31 发布日期:2021-03-26
  • 通讯作者: 刘松峰
  • 基金资助:
    中国地质调查局地质调查项目(DD20190577、DD20190378、DD20190366)和南方海洋与工程广东省实验室(广州)人才引进重大专项(GML2019ZD0106)资助

Origin and tectonic evolution of the Bering Sea since the Late Cretaceous

Liu Songfeng1,2, Yang Chupeng1,2, Ju Dong1, Xiong Liangli1, Li Xuejie1   

  1. 1Guangzhou Marine Geological Survey, Guangzhou 510760, China;
    2Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
  • Received:2020-04-08 Revised:2020-05-27 Online:2021-03-31 Published:2021-03-26
  • Contact: Song-Feng LIU

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摘要： 白令海是西北太平洋最大的边缘海, 形成历史跨越整个新生代, 其构造成因和演化对西太平洋边缘海的研究具有重要意义。晚白垩世以来, 白令海处于北太平洋消减、北冰洋扩张和北美板块总体向西南运动的大地构造体系。通过总结白令海区域最新地球物理、岩石地球化学和年代学等方面的关键地质证据认为: (1)晚白垩世至早始新世, 古太平洋板块(库拉板块)沿白令海陆架边缘-阿拉斯加半岛南缘向北俯冲; (2)始新世, 太平洋板块转向导致俯冲跳跃至阿留申岛弧, 库拉板块残余形成阿留申海盆, 经历复杂的构造变形变质作用形成希尔绍夫海岭的雏形; (3)晚始新世至渐新世, 阿留申海盆向鲍尔斯海岭下俯冲形成鲍尔斯岛弧, 弧后扩张形成鲍尔斯海盆; (4)中新世, 太平洋板块斜向俯冲到阿留申岛弧之下, 形成右行走滑断裂, 发生板片撕裂软流圈上涌, 导致堪察加海盆打开。

关键词: 边缘海, 白令海, 阿留申海盆, 捕获板块, 构造演化

Abstract: The Bering Sea is the largest marginal sea in the northwestern Pacific Ocean, with a history embraced the Cenozoic. The origin and tectonic evolution of the Bering Sea are very important for the understanding of the western Pacific marginal sea. Since the Late Cretaceous, the Bering Sea area has been affected by the subduction of the northern Pacific Ocean, the spreading of the Arctic Ocean and the southwestward movement of the North American Plate. We analyzed key geological evidence, including research findings from geophysical, geochemical, and geochronological studies, and propose the following evolutionary history of the Bering Sea: (1) From the Late Cretaceous to the Early Eocene, the old Pacific Plate (Kula Plate) subducted northward along the Bering Sea shelf to the south of the Alaskan Peninsula; (2) During the Eocene, the subduction of the Pacific Plate jumped from the northern margin of the Bering Sea shelf to the Aleutian Arc, and the residual Kula Plate formed the Aleutian Basin. The complex deformation of the Aleutian Basin formed the prototype of the Shirshov Ridge; (3) From the Late Eocene to the Oligocene, the Aleutian Plate subducted beneath Bowers Ridge, and led to the formation of the Bowers volcanic arc and the Bowers back-arc basin; (4) During the Miocene, oblique subduction of the Pacific Plate beneath the Aleutian Arc led to right-lateral slab tearing, resulting in asthenosphere upwelling and the opening of the Kamchatka Basin.