地质通报Issue(1)：204-216,13.
探地雷达在探测玉树走滑断裂带活动性中的初步应用
A preliminary application of ground penetrating radar to the detection of active faults along Yushu strike-slip faulted zone
摘要
Abstract
GPR (Ground Penetrating Radar) has such characteristics as rapidness, wide range, great detection depth and high resolu⁃tion, with no damage to the surface environment, so it seems to be quite effective in the study of active faults. Based on depicting ac⁃ tive faults along Yushu strike-slip faulted zone, the authors employed high-resolution GPR to delineate active faults in Yushu fault⁃ed zone distributed in Longbao, Xirida and Panqionggou. The characteristic responses of electromagnetic waves were simulated on the basis of the numerical model by Finite-difference time-domain method (FDTD), and then the reflected characteristics of active faults on the GPR profiles was summarized. In this way, the GPR images are interpreted and the location, the orientation and the spatial distribution of the active fault can be accurately determined. Combined with exploratory trench cutting, GPR profile is ex⁃tremely consistent with the trench section. Finally, according to the comparative study of the characteristic responses of electromag⁃netic waves between the GPR profiles and the trench sections, the GPR images of the earthquake epicenter are interpreted. Prelimi⁃nary studies show that GPR seem to be an effective and fast technique in detecting active faults, especially in the area without clear evidence of surface rupture. It not only accurately determines the location, the orientation and the spatial distribution of the active fault but also describes the layer in the subsurface and the section outside the trench, thus providing a reference for the detection of active faults by GPR.关键词
探地雷达/时间域有限差分法/活动断层/探槽Key words
GPR/FDTD/active faults/trench分类
天文与地球科学引用本文复制引用
张迪,李家存,吴中海,钟若飞,田婷婷,张铎,刘晓东..探地雷达在探测玉树走滑断裂带活动性中的初步应用[J].地质通报,2015,(1):204-216,13.基金项目
中国地质调查局项目（编号1212011120163、12120114002101）、国家科技支撑计划课题（编号2012BAH34B01）、国家自然科学基金项目（批准号41371434）、测绘地理信息公益性行业科研专项项目（编号201412020）和国家863项目 （）
