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Starting a New Ocean and Stopping It

机译:开始新的海洋并停止它

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摘要

Small marginal sea basins are often short-lived and typically not older than several to tens of million years, but they play critical roles in global plate tectonic cycles. This paper highlights some recent achievements in answering a range of geodynamic questions stemming from scientific ocean drilling by International Ocean Discovery Program Expeditions 349, 367, 368, and 368X in the South China Sea. Together, results from these expeditions provide new insights into continental breakup in terms of the opening style and time of spreading cessation, magmatism, and sedimentation during the formation of this marginal basin. The outcomes of these expeditions have revealed new challenges and spawned new hypotheses in mantle dynamics and crustal accretion that need to be addressed by future drilling on carefully identified drill targets in the tectonically active western Pacific.
机译:小型边缘海盆地通常寿命短,通常不超过几至数千万年,但它们在全球板块构造循环中起着关键作用。本文着重介绍了国际海底探索计划349、367、368和368X在南中国海进行的科学海洋钻探所引起的一系列地球动力学问题,它们在回答这些地球动力学问题方面取得了一些最新成就。这些探险的结果加在一起,就该边缘盆地形成过程中的停止扩散,岩浆作用和沉积的开放样式和时间,为大陆破裂提供了新的见解。这些探险的结果揭示了新的挑战,并催生了地幔动力学和地壳增生的新假设,需要通过在构造活跃的西太平洋地区仔细确定的钻探目标进行未来的钻探来解决。

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  • 来源
    《Oceanography》 |2019年第1期|153-156|共4页
  • 作者单位

    Zhejiang Univ, Ocean Coll, Zhoushan, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Jimo, Peoples R China;

    Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA;

    Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China;

    Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China;

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