【摘 要】
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Continent subduction is one of the hot research problems in geoscience. New models presented here have been set up and two-dimensional numerical modeling resear
【机 构】
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The Key Laboratory of Orogenic Belts and Crustal Evolution Peking University,Institute of Geology an
【基金项目】
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This work is funded by the Major State Basic Research Development Program of China
论文部分内容阅读
Continent subduction is one of the hot research problems in geoscience. New models presented here have been set up and two-dimensional numerical modeling research on the possibility of continental subduction has been made with the finite element software, ANSYS, based on documentary evidence and reasonable assumptions that the subduction of oceanic crust has occurred, the subduction of continental crust can take place and the process can be simplified to a discontinuous plane strain theory model. The modeling results show that it is completely possible for continental crust to be subducted to a depth of 120 km under certain circumstances and conditions. At the same time, the simulations of continental subduction under a single dynamical factor have also been made, including the pull force of the subducted oceanic lithosphere, the drag force connected with mantle convection and the push force of the mid-ocean ridge. These experiments show that the drag force connected with mantle convection is critical for continent subduction.
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