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中文摘要：
利用渭河盆地2001-2010年高精度GPS监测资料,采用有限元数值分析法,分析了渭河盆地内深大断裂处的构造应力特征及断裂活动特性。结果表明,盆地西部断裂处均呈现出明显的近E-W（east-west）向挤压应力特征,而盆地中部断裂处则均呈现出显著的NW-SE（northwest-southeast）向拉张应力特征,东部断裂处呈现出一定的NW-SE向拉张应力,但该部量值较中部断裂处小;走向各异的同一条深大断裂不同区段,呈现出的应力特征、量值以及活动速率也存在差异性;跨断裂剖线显示沿断裂走向的速度分量在断裂两侧均发生了一定量值的变化,构造断裂具有一定的扭动特性。模拟计算结果进一步显示盆地中部较东、西部受NW-SE向拉张应力作用显著,且在中部这些具有拉张应力特征的深大断裂交汇处,特别是断裂活动速率较大的区段,正是盆地内地裂缝灾害最为集中发育的区域。
英文摘要：
Using high precision GPS data for the period of 2001-2010 of Weihe basin, adopting the finite element numerical analysis method, we obtained the current tectonic stress fields and activities characteristics of deep faults in the Weihe basin. These results show that： the deep faults in western basin present significant compressive stress characteristics in the nearly E-W direction. In central area, obvious tensile stress appears in the NW-SE direction, in east deep faults also present certain tensile stress in the NW-SE direction, but the magnitude is smaller than the central area. Even for the same deep fault with different trends, in different sections, the stress characteristics, values, and activity rates are divergent. The velocity components along the strike of the deep faults show certain changes at both ends of the faults, revealing deep faults in the Weihe basin with twist characteristics. The results further reveal that compared to western and eastern basin, the central area is significantly influenced by the tensional stress in the NW-SE direction. These areas are where deep faults intersect, with tensile stress in central basin, especially in sections with higher movement rates; they show the most developed ground fissure hazards.
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Two-dimensional deformation monitoring over Qingxu(China) by integrating C-,L- and X- bands SAR imag
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