地震学报Issue(5)：872-882,11.DOI:10.3969/j.issn.0253-3782.2014.05.011
基于随温度变化的热系数模拟板块俯冲动力学过程
Modeling the dynamic process of slab subduction based on temperature-dependent thermal coefficients
摘要
Abstract
The thermal conductivity and expansion coefficients are two signifi-cant parameters that have influence on the dynamic process of slab subduction. Due to the heterogeneity of Earth medium,these two coefficients are usually variable with depth.Unfortunately,such variations are often ignored in current modeling studies of geodynamics.The present study refers to the temperature-dependent thermal conductivity and expansion to simulate the dynamic process of slab subduction.The impact of thermal parameters and viscosity on slab ge-ometry and the corresponding characteristics of mantle convection are analyzed. The modeling results show that the temperature-dependent thermal conductivity and expansion affect the subduction angle by changing the thermal and viscosity structure.The viscosity plays a critical role in controlling the slab dynamic evo-lution.The mantle convection is affected by viscosity structure and exhibits dif-ferent patterns,such as layered convection and local multiple convection loops, etc.关键词
板块俯冲/黏度结构/地幔对流/数值模拟Key words
slab subduction/viscosity structure/mantle convection/numerical modeling分类
天文与地球科学引用本文复制引用
张晨,张双喜..基于随温度变化的热系数模拟板块俯冲动力学过程[J].地震学报,2014,(5):872-882,11.基金项目
国家重点基础研究“973计划”课题（2013CB733303）和地球物理大地测量国家地理信息局重点实验室项目（11-02-09）资助． （）
