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7月1日法國Jean-Claude Sibuet教授來訪學術報告通知

時間:2019-06-28瀏覽:13

報告題目:Geodynamics of the South China Sea and Philippine Sea plate


報告人:Prof. Jean-Claude Sibuet

                Ifremer Centre de Brest  ,France.


報告人簡介:

法國國際知名的老虎机游戏老虎机游戏物理學家和構造地質學家Jean-Claude Sibuet教授。一直致力於張裂大陸邊緣形成演化的研究 ,在大西洋陸緣區、孟加拉國國海底扇區以及西太平洋區的沖繩海槽、臺灣造山帶和南海構造變形等研究領域具有獨到的見解 。曾擔任Marine Geophysical Research雜誌主編10多年;40多個航次首席科學家  ,其中包括ODPLegs 47B, 80 and 210);在包括《Nature》在內的地學期刊發表過180多篇文章  。


報告內容簡介:

        The only way to understand the extent and nature of the South China Sea (SCS) at the end of spreading is to unfold the Manila slab, which is the subducted part of the SCS and to identify the nature of the crust (oceanic or thinned continental) from mid-slab dVp values. The objective of this talk is to propose a kinematic reconstruction of the SCS at the end of sea-floor spreading and to discuss its geodynamic consequences in the context of the SCS and Philippine Sea plate (PSP) evolution. PSP reasonable paleo-latitudes and poorly defined paleo-declinations were the only way to establish the kinematic evolution of the PSP through time (e.g. Hall, 1995 and 2002; Queano et al., 2007) until 2016 when Wu et al. (2016) introduced a new kinematic constraint based on the unfolding and restoration of Southeast Asian slabs. Even if unfolded slabs have low spatial and age resolutions relative to traditional plate tectonic reconstructions, large subducted slabs mapped around SE Asia supply important first-order kinematic constraints. During Eocene, two rifting phases observed in the SCS occurred simultaneously with two major phases of oceanic opening in the PSP, showing that the SCS and PSP shared a common left-lateral shear plate boundary, which is the eastern plate boundary of the « Greater PSP ». The « Greater PSP » is defined by the PSP sensu stricto, which aggregated, at different periods of time, fragments as the Carolina plate and deep Otong-Java slab to the east or the Huatung basin and North Luzon to the south. Since the end of SCS spreading or still during SCS seafloor spreading, the eastern plate boundary of the « Greater PSP » corresponds to the SCS-PSP boundary and is obliquely convergent, resulting in the formation of the Manila subduction zone. The inception of the Manila trench occurred at the location of the eastern boundary of the SCS with the subduction of the young SCS beneath the old adjacent Huatung basin.


告時間:2019年7月1日(週一)15:30-17:00


報告地點:老虎机游戏樓一樓報告廳


邀請人:黃奇瑜


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