从震前卫星热红外图像看中国现今构造应力场特征

震前卫星热红外探测现今地球热应力场, 既有水平应力热场, 也有垂直应力热场。热辐射能量的增强与应力增强有关。结合地震地表破裂带和地震等烈度线图的分析, 辅以GPS空间定位地形变测量、震源机制解和原地应力解除法,以及地球物理勘探资料, 可使对现今应力场的了解更加全面。以99?~104?E为界的过渡带包含中国大陆西部重庆荣昌双环、四川汶川椭圆。这种左右涡旋运动方式不同存在一个带内, 与深部构造差异和物质下曳运动有直接的关系。中国西部受印度板块和西北利亚板块SN向夹击, 来自西北利亚板块的作用力最南可到天山北麓。印度板块与太平洋板块相互扭动, 壳幔汁上涌差异反映在中国西部热旋扭椭圆为左旋扭动。印度板块与太平洋板块相互扭动, 中国东部地区出现伸展构造。NE、NNE向破裂发生右旋运动, 可称之新新华夏构造体系。壳幔汁上涌差异反映在东部热旋扭椭圆为右涡旋扭动。

The Characteristic of Current Stress Hot Field by Satellite Thermal Infrared Image in China

Prior to earthquake occurrence serving the current stress hot field by satellite thermal infrared scanner there are having horizontal and vertical stress hot field in the earth. There are the heat radiation more which de-pend upon the stress increasing. Take the earthquake surface fracture zones and the map of iso-intensity into the consideration, combine these data of GPS, focus moment solution and relax of stress, the current stress field is obtained correctly. Judge eastern and western part with its deep structure movement difference and a result of the crust-mantle left-lateral and right-lateral and up-flow on boundary of 99°～ 104°E. It was converging attack from both N and S sides. The N side is Sibire plate and S is India plate. The force from the N will be at an end of Tian- shan mountain. The Sibire plate and Pacific Ocean plate are revolving each other. The difference of the crust=mantle uprush in the western part of China reflects on the left up flow in the deep crust. The Sihire plate and Pacific Ocean plate are revolving each other. There is extensional structure in the north part of eastern part of China. Along these fracture NE, NNE direction occur right lateral movement that means New Neocathaysian. The difference of the crust-mantle uprush in the eastern part of China reflects on the right up flow in the deep crust.