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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Cenozoic lithospheric deformation in Northeast Asia and the rapidly-aging Pacific Plate
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Cenozoic lithospheric deformation in Northeast Asia and the rapidly-aging Pacific Plate

机译：东北亚的新生代岩石层变形和快速老化太平洋板块

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摘要

Northeast Asia underwent widespread rifting and magmatic events during the Cenozoic. The geodynamic origins of these tectonic events are often linked to Pacific plate subduction beneath Northeast Asia. However, the Japan Sea did not open until the late Oligocene, tens of millions of years after Pacific Plate subduction initiation in the Paleocene. Moreover, it is still not clear why the Baikal Rift Zone extension rate increased significantly after the late Miocene, while the Japan Sea opening ceased at the same time. Geodynamic models suggest these enigmatic events are related to the rapidly-aging Pacific Plate at the trench after Izanagi-Pacific spreading ridge subduction. Subduction of the young Pacific Plate delayed the Japan Sea opening during the Eocene while advection of the old Pacific Plate towards the trench increases seafloor age rapidly, allowing the Japan Sea to open after the early Miocene. The Japan Sea opening promotes fast trench retreat and slab stagnation, with subduction-induced wedge zone convection gradually increasing its extent during this process. The active rifting center associated with wedge zone convection upwelling also shifts inland-ward during slab stagnation, preventing further japan Sea spreading while promoting the Baikal Rift Zone extension. Our geodynamic model provides a good explanation for the temporal-spatial patterns of the Cenozoic tectonic and magmatic events in Northeast Asia. (C) 2018 Elsevier B.V. All rights reserved.
机译：东北亚在新生代期间接受了广泛的渔罗和魔法事件。这些构造事件的地磁渊源通常与东北亚下面的太平板俯冲相关联。但是，日本海在古典太平洋郊区划分后，日本海径直到晚矿床，数百万年后。此外，仍然不清楚为什么贝吉尔裂口区延长速率在后期后期后延伸率显着增加，而日本海开口同时停止。地球动力学模型表明这些神秘事件与冰川太平洋蔓延后沟渠沟槽的快速老化太平洋板有关。年轻太平洋板的俯冲延迟了农民期间的日本海洋开口，同时对旧太平洋板朝着沟渠的平流迅速增加了海底时代，允许日本海上初中开放。日本海开口促进快速沟渠撤退和板坯停滞，潜水引起的楔形区域对流逐渐增加其在此过程中的程度。与楔形区域对流的活跃中心的活跃渐变中心也在平板停滞期间改变内陆病房，防止日本进一步的海洋蔓延，同时促进百吉湖裂缝区延伸。我们的地球动力学模式对东北亚的新生代构造和岩石事件的时间空间模式提供了良好的解释。 （c）2018年elestvier b.v.保留所有权利。

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