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基于有限元分析 ,提出一种新的三维构造面连续恢复算法———逆位移梯度法 ,避免了非连续恢复中因拼贴方案不同而可能导致得出不同恢复结果的问题 ,同时减少输入数据 ,且易于编程。以辽河坳陷滩海区东部沙三段底面构造恢复为例 ,验证该算法的有效性。恢复结果表明 :①东西向的伸展构造变形量分布不均匀 ,南部小 ,北部大 ,因为所处的构造变形特征不同 ;②东部近东西向的次级断层组的滑线方向基本上与断层走向垂直 ,没有明显的走滑位移分量 ,应属于正断层范畴 ,不支持北北东向边界断层走滑派生出近东西向次级断层的观点。
Based on the finite element analysis, a new three-dimensional continuous reconstruction algorithm called the inverse displacement gradient method is proposed, which avoids the problem of different recovery results caused by the different collage schemes in the discontinuous recovery, and reduces the input data , And easy to program. Taking the recovery of the bottom of Shahejie Formation in the east of Liaohe Depression as an example, the validity of this algorithm is verified. The results show that: (1) The distribution of east-west extension tectonic deformation is unevenly distributed, while the southern part is small and the northern part is big because of the different deformation features of the tectonic deformation; (2) The slip direction of the sub-fault group in the east- Vertical and no obvious strike-slip displacement components should belong to the normal fault category, and do not support the view that the fault strike-slip of the NE-EW boundary produces a near-east-west sub-fault.