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根据地壳厚度、重磁场特征、晚第四纪活动断裂、地貌差异、断陷盆地、地震活动差异等 ,将研究区作了一、二级块体的划分 ,其中一级块体 7个 ,二级块体 33个。一级块体平面上多数呈长条形 ,剖面上呈梯形、倒梯形 ,少数为多边形、三角形。二级块体平面上多数呈菱形 ,剖面上呈叠瓦状上冲形 ,少数呈条形或三角形。块体的主要运动形式有 :水平挤压、垂直升降、流展和旋转。块体运动受地壳“压缩 -挤出 -旋转”机制控制 ,即地壳块体受到挤压后产生强烈收缩 ,随后产生地壳块体隆起并产生向东的侧向挤出 ,并在挤出过程中产生块体反时针方向旋转。这一结果对“高分辨率地形变的观测研究和地震预报”有重要的科学意义。
Based on the crustal thickness, the characteristics of heavy and magnetic fields, the Late Quaternary active faults, the differences of geomorphology, the fault basin and the difference of seismic activity, the study area is divided into one and two blocks, of which seven are first grade, two Level 33 blocks. A block of the majority of the plane was elongated, cross-section was trapezoidal, inverted trapezoid, a few for the polygons, triangles. Most of the blocks on the second level are rhombic in shape, and are shimmering on the cross section, with a few being strip or triangle. The main form of block motion are: horizontal extrusion, vertical movements, flow and rotation. Block motion is controlled by crustal “compression-extrusion-rotation” mechanism, which means that the crustal block is strongly compressed after being crushed, then crustal block uplift occurs and lateral eastward extrusion occurs. During the extrusion process Generate block anti-clockwise rotation. This result is of important scientific significance for “observational studies and earthquake prediction of high-resolution deformation”.