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- 2017
渭河盆地深大断裂处构造应力特征及其活动特性
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Abstract:
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
| [1] | The State Seismological Bureau. The Activity Faults of Ordos Surrounding[M]. Beijing: Earthquake Press, 1988(国家地震局.鄂尔多斯周缘活动断裂系[M].北京: 地震出版社,1988) |
| [2] | Zhao Chaoying, Zhang Qin, Ding Xiaoli,et al. Positioning of Xi'an Active Ground Fissures with SAR Interferometry[J]. <em>Geomatics and Information Science of Wuhan University</em>, 2009, 34(7): 809-813(赵超英,张勤,丁晓利,等. 利用InSAR技术定位西安活动地裂缝[J].武汉大学学报·信息科学版,2009, 34(7): 809-813) |
| [3] | Peng Jianbing, Chen Liwei, Huang Qiangbing, et al. Large-scale Physical Simulative Experiment on Ground-Fissure Expansion Mechanism[J]. <em>Chinese J Geophys,</em> 2008, 51(6): 1 826-1 834(彭建兵,陈立伟,黄强兵,等.地裂缝破裂扩展的大型物理模拟试验研究[J].地球物理学报,2008, 51(6): 1 826-1 834) |
| [4] | Teng Jiwen. Introduction to Solid Earth Geophysics[M]. Beijing: Seismological Press, 2003(滕吉文.固体地球物理学概论[M].北京:地震出版社,2003) |
| [5] | Jiang Fengyun, Wang Shuangxu, Zhang Xi, et al. On Horizontal Crust Movement in Northeastern Margin of Qinhai-Tibet Block with 2D FEM[J]. <em>Journal of Geodesy and Geodynamics</em>, 2007, 27(4): 21-30(蒋锋云,王双绪,张希,等.用二维有限元研究青藏块体东北缘地壳的水平运动[J].大地测量与地球动力学,2007,27(4): 21-30) |
| [6] | Zhang Peizhen, Gan Weijun, Shen Zhenkang, et al. A Coupling Model of Rigid-Block Movement and Continuous Deformation: Patterns of the Present-Day Deformation of China's Continent and Its Vicinity[J]. <em>Acta Geologica Sinica</em>, 2005, 79(6): 748-756(张培震,甘卫军,沈正康,等.中国大陆现今构造作用的地块运动和连续变形耦合模型[J].地质学报,2005, 79(6): 748-756) |
| [7] | Wang Weidong. Study on the Regional Stability Dynamical Background in the Forming of Xi'an Ground Fissures[D]. Xi'an: Chang'an University, 2009(王卫东.西安地裂缝形成的区域稳定动力学背景研究[D].西安:长安大学,2009) |
| [8] | Qu Wei, Lu Zhong, Zhang Qin, et al. Kinematic Model of Crustal Deformation of Fenwei Basin, China Based on GPS Observations[J]. <em>Journal of Geodynamics</em>, 2014,75(4): 1-8 |
| [9] | Peng Jianbing, Zhang Jun, Su Shengrui, et al.The Activity Faults and Ground Fissures Disaster of Weihe Basin[M]. Xi'an: Northwestern University Press, 1992(彭建兵,张俊,苏生瑞,等.渭河盆地活动断裂与地质灾害[M].西安:西北大学出版社, 1992) |
| [10] | Qu Wei, Zhang Qin, Li Zhenhong, et al. Determining Source Parameters of Active Faults and Ground Fissures in Qingxu (Shanxi, China) Region[J]. <em>Geomatics and Information Science of Wuhan University</em>, 2013, 38(3): 421-425(瞿伟,张勤,李振洪,等.山西清徐地裂缝构造活动参数反演[J].武汉大学学报·信息科学版,2013,38(3): 421-425) |
| [11] | Qu Wei, Zhang Qin, Wang Qingliang, et al. Research on Present Crustal Horizontal Deformation Feature of Weihe Basin and Its Tectonic Activity[J]. <em>Geomatics and Information Science of Wuhan University</em>, 2011, 36(7): 830-834(瞿伟,张勤,王庆良,等.渭河盆地现今地壳水平形变特征及区域构造活动性[J]. 武汉大学学报·信息科学版,2011, 36(7): 830-834) |
| [12] | Zhang Qin, Qu Wei, Peng Jianbing, et al.Research on Tectonic Causes of Numerous Ground Fissures Development Mechanism and Its Unbalance Distribution Berween Eastern and Western of Weihe Basin[J]. <em>Chinese J Geophys</em>, 2012, 55(8): 2 589-2 597(张勤,瞿伟,彭建兵,等.渭河盆地地裂缝群发机理及东、西部地裂缝分布不均衡构造成因研究[J].地球物理学报,2012, 55(8): 2 589-2 597) |
| [13] | Dai Wangqiang, Ren Jun, Zhao Xiaomao, et al. Characteristics of Horizontal Crustal Movement in Weihe Basin and Adjacent Zones by GPS Observation[J]. <em>Acta Seismologica Sinica</em>, 2004,26(3): 256-260(戴王强,任隽,赵小茂,等.GPS初步揭示出的渭河盆地及边邻地区地壳水平运动特征[J].地震学报,2004,26(3): 256-260) |
| [14] | Zhang Jiaming. Research on Ground Fissures in Xi'an[M]. Xi'an: Northwestern University Press, 1990(张家明.西安地裂缝研究[M].西安:西北大学出版社,1990) |
| [15] | Xie Zhengqian, Fang Jian, Tian Xitang, et al. The Evolution of the Structural Stress Field and Analysis of the Formation Mechanism in the Weihe Basin[J]. <em>Journal of Xi'an College of Geology</em>, 1991, 12(1): 46-52(谢振乾,方继安,田西堂,等.渭河盆地构造应力场演变及盆地形成机制分析[J].西安地质学院学报,1991, 12(1): 46-52) |
