论文部分内容阅读
众所周知,不对称的地堑盆地主要受盆地纵向断裂构造的控制,呈长轴状分布。此外,盆地两侧断裂的性质有明显的差异。一侧构造活跃,为断距很大的深断裂带;另一侧构造较稳定,断裂多呈阶梯状分布。由于断裂性质的差异,盆地的沉降中心明显地偏向深断裂带,使盆地沉积厚度的分布不对称;两侧山地河流的水流性质和下切幅度不同,使带入盆地的碎屑物的粒度成分各异;盆地两侧发育不同类型的冲积扇,洪积物的性质显著不同。所有这些由构造因素引起的盆地沉积岩相的特征,都影响着盆地地下水的富集规律。
As we all know, asymmetric graben basins are mainly controlled by longitudinal fault structures in the basin, presenting a long axis distribution. In addition, the nature of the fracture on both sides of the basin is obviously different. Active on one side, it is a deep fault with a large fault distance. On the other side of the fault, the structure is relatively stable and most of the faults are in a ladder-like distribution. Due to the difference in fracture properties, the sedimentation center of the basin is obviously biased toward the deep fault zone, resulting in the asymmetric distribution of sedimentary thickness. The flow characteristics and undercutting amplitude of the mountainous rivers on both sides are different, Different; alluvial fans developed on both sides of the basin, the nature of the flood sediment significantly different. All of these characteristics of sedimentary facies of the basin caused by structural factors have an impact on the enrichment of groundwater in the basin.