中国大陆热流分布特征及热-构造分区

Terrestrial Heat Flow Pattern and Thermo tectonic Domains in the Continental Area of China

根据中国大陆 82 2个实测热流数据 ,研究了中国大陆主要构造单元的深部地热特征 ,包括 40km深度的地温值、热岩石圈厚度、岩石圈累积强度和有效弹性层厚度 (EET)等 .结果显示 ,中国大陆热流的空间分布以及岩石圈热状态和流变学特征均表现出明显的横向非均匀性 .这源于太平洋板块俯冲和印度 亚洲碰撞导致的新生代构造热活动 .根据热流值和深部地热参数 ,中国大陆可以划分为东部、中部和西部三个大尺度热 构造区 .

On the basis of total 822 heat flow measurement in the continental area of China, the deep geothermal characteristics of lithosphere of the major tectonic units was studied, which includes the temperature at 40 km depth, the thickness of thermal lithosphere, the cumulated strength and effective elastic thickness (EET) of lithosphere and so on. The results exhibit significantly lateral heterogeneity for heat flow pattern, thermal state and rheological features of lithosphere in China, which resulted from the Cenozoic tectonothermal activities related to the Pacific subduction as well as the collision between India and Asia. According to heat flow values and deep geothermal characteristics, three large scale thermo tectonic domains, i.e. Eastern, Central and Western domain, can be identified in the continental area of China.