板块俯冲带水流体活动及其效应的定量化数值模拟

李忠海; 杨舒婷; 刘明启; 皇甫鹏鹏

doi:10.3799/dqkx.2019.232

Volume 44 Issue 12

Dec. 2019

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Article Navigation > Earth Science > 2019 > 44(12): 3984-3992

Li Zhonghai, Yang Shuting, Liu Mingqi, Huangfu Pengpeng, 2019. Aqueous Fluid Activity and Its Effects in the Subduction Zones: A Systematic Numerical Modeling Study. Earth Science, 44(12): 3984-3992. doi: 10.3799/dqkx.2019.232

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Li Zhonghai, Yang Shuting, Liu Mingqi, Huangfu Pengpeng, 2019. Aqueous Fluid Activity and Its Effects in the Subduction Zones: A Systematic Numerical Modeling Study. Earth Science, 44(12): 3984-3992. doi: 10.3799/dqkx.2019.232

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Aqueous Fluid Activity and Its Effects in the Subduction Zones: A Systematic Numerical Modeling Study

doi: 10.3799/dqkx.2019.232

Key Laboratory of Computational Geodynamics, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2019-08-09
Publish Date: 2019-12-15

Abstract

Abstract

In order to study the effects of aqueous fluid activity on the subduction channel processes and continental collision dynamics,systematic numerical models were constructed with integrated thermodynamic and thermomechanical methods. The model results indicate that the subducted crustal materials may either exhume along the subduction channel to the surface near the suture zone,or extrude sub-vertically upward through the mantle wedge to the crust of the overriding plate. The contrasting modes are strongly dependent on the thermal structure of subduction zones. The temperature field controls the aqueous fluid and melt activities,which further regulates the weakening of overriding mantle wedge and finally dominates the material transportation in the subduction channel. Meanwhile,the lithospheric deformation during continental subduction and collision is also strongly dependent on the fluid-melt activity and the induced lithospheric weakening. The numerical models contribute significantly to the better understanding of subduction-zone fluid-melt activity and the geodynamic processes.
- subduction zone,
- fluid activity,
- exhumation,
- delamination,
- numerical modeling,
- geodynamics

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References(25)

References

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