最大转动角梯度准则在断层预测中的应用研究(Ⅰ)─—断层构造转动和形变的度量及变形岩层初始位形的恢复

Applied Study of the Maximum Rotation Angle Grade Criterion (MRAGC) in Forecasting Faults(Ⅰ)──The measurement of rotation and strain of fault-structure and the recover of undeformed configuration of a deformed rock-bed

介绍了转动与变形的和分解定理以及最大转动角准则（MRAGC）．考虑到无褶皱或褶皱不发育的沉积岩区的断层变形的特点，将断层面简化为连续变形的岩层面，从而将MRAGC引入到断层预测的研究中．并且从数值离散的角度探讨了度量断层构造的转动和形变的可能性，给出了一种新的恢复变形岩层初始位形的方法．这种新方法克服了其它方法所存在的缺陷和不足．研究结果表明：用MRAGC进行断层构造预测的关键是：1）度量断层构造的转动和形变；2）恢复变形岩层的初始位形．

S-R (strain-rotation) decomposition theorem and the maximum rotation angle grade Criterion (MRAGC) was introduced. Considering the strain characteristic of faults in the area where no fold or only a few folds exist, a fault surface was simplified to a rock bed surface of the consecutive strain. Then MRAGC was introduced to forecast faults. And the feasibility of measuring the rotation and strain of faults was discussed based on numerical discretization, and a new method recovering the undeformed configuration of a deformed rock bed was proposed, which overcomes some defects of other methods. The researched result shows that the main things of forecasting faults with MRAGC are measuring the rotation and strain of faults and recovering the undeformed configuration of a deformed rock bed.