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Numerical simulation of the effects of upward throughflow on the thermal structure and the thickness of the continental lithosphere
Based on the porosity-wave mass-transport and heat-transfer conceptual model in the continental lithosphere, the effects of upward throughflow on the continental lithosphere thermal structure are discussed. Previous theoretical works have proposed three thermal structure modes in the continental lithosphere, namely the heat-conductive-only lithosphere, the heat-conductive-and-advective lithosphere with a pore fluid of constant density, and the heat-conductive-and-advective lithosphere with a pore fluid of variable density (temperature-dependent density). The main purpose of this paper is to use the theoretical model to conduct parametric analysis and compare the numerical results produced with geological observation data. Two points are indicated. (1) The heat-conductive-only lithosphere may represent the thermal structure mode in the shield (or the stable platform), while the heat-conductive-and-advective lithosphere with a pore fluid of variable density often represents the lithospheric thermal structure mode in the continental active region or the orogenic belt. (2) The upward throughflow is the major factor to affect the stable lithospheric thickness of the Qinghai-Xizang plateau, North China, South China and the marginal sea region, demonstrating that the upward throughflow can have significant effects on the thermal structure mode of a continental lithosphere.
Numerical simulation of the effects of upward throughflow on the thermal structure and the thickness of the continental lithosphere
Based on the porosity-wave mass-transport and heat-transfer conceptual model in the continental lithosphere, the effects of upward throughflow on the continental lithosphere thermal structure are discussed. Previous theoretical works have proposed three thermal structure modes in the continental lithosphere, namely the heat-conductive-only lithosphere, the heat-conductive-and-advective lithosphere with a pore fluid of constant density, and the heat-conductive-and-advective lithosphere with a pore fluid of variable density (temperature-dependent density). The main purpose of this paper is to use the theoretical model to conduct parametric analysis and compare the numerical results produced with geological observation data. Two points are indicated. (1) The heat-conductive-only lithosphere may represent the thermal structure mode in the shield (or the stable platform), while the heat-conductive-and-advective lithosphere with a pore fluid of variable density often represents the lithospheric thermal structure mode in the continental active region or the orogenic belt. (2) The upward throughflow is the major factor to affect the stable lithospheric thickness of the Qinghai-Xizang plateau, North China, South China and the marginal sea region, demonstrating that the upward throughflow can have significant effects on the thermal structure mode of a continental lithosphere.
Numerical simulation of the effects of upward throughflow on the thermal structure and the thickness of the continental lithosphere
Numerical simulation of the effects of upward throughflow on the thermal structure and the thickness of the continental lithosphere
Lu Zhang (Autor:in) / Zian Li (Autor:in) / Chongbin Zhao (Autor:in) / Ge Lin (Autor:in) / Huadong Guo (Autor:in)
Journal of Geophysics and Engineering ; 8 ; 322-329
01.06.2011
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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