大地测量联合反演构造应力场理论及应用

Geodetic joint inversion of tectonic stress field is an intersection of geodesy, geodynamics and seismology. The main contents of this field are quantitative dynamical research of crustal movement and deformation, seismic analysis and forecast. In this project, we have deduced the joint inversion model of geodetic data, seismic data and geological data considering about their weight ratio; presented Bayes-iterative search inversion algorithm which improved on the traditional Bayes algorithm and strengthen the stability of inversion solutions; enriched and developed geodetic joint inversion theory and method of tectonic stress field; joint with geodetic (mostly with GPS data), seismic, geological and geophysical data, we have inverted the temporal and spatial variation characteristics of crustal deformation of active tectonic blocks in North China and the present-day cruatal movement and strain-stress field by FEM, DDA and bi-cubic spline function fit method; especial for the crustal deformation result in some typical areas, we have presented geodynamical interpretation and done some seismic dangerous estimations.

研究各类大地测量、地质和地球物理等观测值之间的同源性关系，应用信息论、动态规划、有限单元法及随机反演法研究大地测量联合反演模式及反演解可靠性评判准则，发展大地测量反演理论；通过构造应力场联合反演，进行地壳形变的动力学过程解释，研究其与地震的关系，进行地震危险性估计。本项目研究结果对防灾减灾及发展地球科学理论有重要意义。