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    维嘉海山沉积过程及其对西太平洋海山演化的意义

    赵斌 吕文超 何高文 张宝金 韦振权 宁子杰 张旭东

    赵斌, 吕文超, 何高文, 张宝金, 韦振权, 宁子杰, 张旭东, 2022. 维嘉海山沉积过程及其对西太平洋海山演化的意义. 地球科学, 47(1): 357-367. doi: 10.3799/dqkx.2020.291
    引用本文: 赵斌, 吕文超, 何高文, 张宝金, 韦振权, 宁子杰, 张旭东, 2022. 维嘉海山沉积过程及其对西太平洋海山演化的意义. 地球科学, 47(1): 357-367. doi: 10.3799/dqkx.2020.291
    Zhao Bin, Lü Wenchao, He Gaowen, Zhang Baojin, Wei Zhenquan, Ning Zijie, Zhang Xudong, 2022. Sedimentary Processes of Weijia Guyot and Implications for Western Pacific Seamount Evolution. Earth Science, 47(1): 357-367. doi: 10.3799/dqkx.2020.291
    Citation: Zhao Bin, Lü Wenchao, He Gaowen, Zhang Baojin, Wei Zhenquan, Ning Zijie, Zhang Xudong, 2022. Sedimentary Processes of Weijia Guyot and Implications for Western Pacific Seamount Evolution. Earth Science, 47(1): 357-367. doi: 10.3799/dqkx.2020.291

    维嘉海山沉积过程及其对西太平洋海山演化的意义

    doi: 10.3799/dqkx.2020.291
    基金项目: 

    南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项 GML2019ZD0106

    国家自然科学基金项目 41803026

    同济大学海洋地质国家重点实验室开放基金项目 MGK202007

    同济大学海洋地质国家重点实验室开放基金项目 MGK1920

    中国大洋协会“十三五”项目 DY135-C1-1-01

    中国大洋协会“十三五”项目 DY135-C1-1-06

    详细信息
      作者简介:

      赵斌(1987-), 男, 高级工程师, 硕士, 主要从事海洋地质与地球物理综合研究.ORCID: 0000-0002-8167-3260.E-mail: zbin_a@mail.cgs.gov.cn

      通讯作者:

      吕文超, E-mail: lvwenchao01@163.com

    • 中图分类号: P67

    Sedimentary Processes of Weijia Guyot and Implications for Western Pacific Seamount Evolution

    • 摘要:

      海山沉积过程与全球气候变化和古海洋演化有着紧密联系,维嘉海山保留了西太平洋晚中生代以来的完整沉积记录,是探索西太平洋海山构造演化的理想场所. 基于浅地层剖面、大洋钻探和最新相关研究成果,通过研究海山的沉积特征、火山活动和沉降速率等,探索西太平洋维嘉海山晚中生代以来的沉积过程. 结果显示维嘉海山顶部发育3个沉积单元,并发现了始新世第二次火山活动的可能证据,推算出维嘉海山中中新世(~11.6 Ma)以来的沉积速率约为6.03 mm/ka. 首次建立了维嘉海山的演化模型,认为维嘉海山演化主要经历了7个阶段,在渐新世之前处于缓慢沉降状态,其顶部水深一直保持在数百米之间,之后出现拐点,早中新世(~20 Ma)之后开始加速沉降,可能与该时期太平洋板块运动方向的迅速转换有关.

       

    • 图  1  研究区地理位置及区域构造简图

      西太平洋海山名称及测年数据参考自Koppers et al.(1998)、Lee et al.(2005)、Du et al.(2017)、Tang et al.(2019)和Zhao et al.(20192020). NAZ. 纳兹卡板块;COC. 科克斯板块

      Fig.  1.  Location and regional tectonic map of the study area

      图  2  维嘉海山多波束海底地形图

      Fig.  2.  Bathymetric map of Weijia Guyot

      图  3  维嘉海山顶部岩性地层剖面

      修改自Hesse (1973)和Mel'nikov et al.(2012)

      Fig.  3.  Stratigraphy profile of the summit of Weijia Guyot

      图  4  维嘉海山顶部浅地层剖面

      测线位置见图 2

      Fig.  4.  Sub-bottom profile on the summit of Weijia Guyot

      图  5  维嘉海山顶部沉积物厚度分布

      a. 火山岩基底之上的整体沉积物厚度;b. 远洋沉积物厚度

      Fig.  5.  Sedimentary thickness on the summit of Weijia Guyot

      图  6  维嘉海山第二次火山活动浅地层剖面特征

      测线位置见图 2

      Fig.  6.  Sub-bottom profile characteristics of rejuvenated volcanism of Weijia Guyot

      图  7  维嘉海山沉积与演化过程示意图

      Fig.  7.  Sedimentary process and evolution of Weijia Guyot

      图  8  西太平洋维嘉海山和OSM4海山沉降速率曲线

      Fig.  8.  Subsidence rates of Weijia Guyot and OSM4 seamount in western Pacific Ocean

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    • 收稿日期:  2020-04-29
    • 网络出版日期:  2022-02-11
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