临汾盆地及其边界断裂现今变形特征  

PRESENT-DAY CRUSTAL DEFORMATION OF LINFEN BASIN AND ITS BOUNDARY FAULTS

作　　者：刘瑞春[1,2] 季灵运[3] 

机构地区：[1]山西省地震局,太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,太原030021 [3]中国地震局第二监测中心,西安710054

出　　处：《大地测量与地球动力学》2014年第1期28-31,共4页Journal of Geodesy and Geodynamics

基　　金：山西省青年科技研究基金(2011021024-1);中国地震局2013年度震情跟踪青年课题(2013020214);中国地震局地震行业科研专项(201208009-14);中国地震局地震科技星火计划(XH13004)

摘　　要：利用干涉图堆叠技术研究得到临汾盆地及其边界断裂2003-2010年的平均地壳形变速率场，结果表明：1）临汾盆地现今地壳形变场整体上表现为盆地下沉，两侧山体相对隆升的继承性变形特征，罗云山断裂为地壳形变速率差异的分界地段；2）罗云山断裂中段和南段的差异运动相比北段更为显著，最大差异形变速率分别为4mm／a和6mm／a；而在断裂范围内，变形速率均为2mm/a左右，与同期跨断层水准观测结果较为一致；3）盆地内部在整体下沉的背景下，不同的构造单元具有不同的变形速率，且形变速率自北向南逐渐增大。以临汾市区为界，洪洞一临汾凹陷北部和南部的变形速率分别为0～4mm／a和4～8mm／a；襄汾凸起较为稳定，变形速率在零值附近波动；南部的侯马凹陷形变速率进一步加大，其东北部和西部区域的形变速率分别为4—8mm/a和8～12mm／a。Stacking-InSAR technology was used to measure the average crustal deformation rate of Linfen Basin and its boundary faults during 2003-2010. The results show that the inner part of Linfen Basin was subsiding and the mountains on both sides were rising relatively. The differential movement rate in middle section（Yuli-Yucun） of Luoyunshan Fault was 4 mm/a, the rate in southern section（Fanjiazhuang-Xiweikou） was 6 ram/a, and the rate a-round the Fault was about 2 mm/a, which corresponds with the result of the cross-fault leveling at the same time. Within Linfen Basin, different tectonic units had different deformation patterns, the rate increased gradually from north to south. The rate in the northern part and in the southern part of Hongtong-Linfen Depression was 0 - 4 mm/a and 4 - 8 mm/a respectively. The Xiangfen Bulge was stable. The rate in the northeast part of Houma Depression was 4 - 8 mm/a, and 8 - 12 mm/a in the west part.

关 键 词：D—InSAR 干涉图堆叠技术 临汾盆地 罗云山断裂 平均变形速率 

分 类 号：P315.725[天文地球—地震学]