重力场与构造应力场内在关系的理论研究

根据地球动力学原理，提出了重力异常变化量向构造应力场应力降转化的理论模型，推导了简明的应力降值及其方位角的实用计算公式。考虑到研究的是动态场，涉及到的时间范围短，在做理论分析时，可以忽略地形改正和莫霍面深度起伏改正。从而，能够应用重力测量研究监测区域的动态应力场特征。根据应力分析方法，阐明了重力场和应力场的异常变化与孕震过程存在密切关系。

STUDY ON THE INNER RELATION OF GRAVITY TO TECTONIC STRESS FIELDS

In this paper, the innate relation between the gravity field and the tectonic stress field is studied. According to the dynamics of the earth, the mathematical representation on gravity anomaly change into tectonic stress drop is effectively established. The formula gives the quantity and the direction of the stress drop. It is shown that there exists the close relation among abnormal change of gravity field and stress field and seismogenic process. The information about anomalous gravity could be used to study the tectonic stress characters in the same areas, which is very significant in the earthquake prediction and the partition of risk strong earthquake region.