沂沭断裂带垂直形变特征与异常分析  

CHARACTERISTICS AND ANOMALY ANALYSIS OF VERTICALDEFORMATION OF YISHU FAULT ZONE

作　　者：李杰[1] 燕乃玲[1] 冯志军[1] 

机构地区：[1]山东省地震局

出　　处：《地震学刊》1998年第2期10-17,共8页Journal of Seismology

摘　　要：利用跨断层水准测量资料，结合长水准测量成果，重点分析了沂沭断裂带及其附近地区垂直形变特征及本区中强地震前异常形态。结果表明：沂沭带附近的地壳形变明显受新构造活动的控制，断层的最大垂直运动速率为０５０ｍｍ／ａ，沂沭带断层垂直运动平均速率合成值约为０３４ｍｍ／ａ，现今总体活动水平较低；沂沭带北段及北西向断裂近期呈反向运动，南段呈继承性构造运动，部分测点在本区中等及中强地震前异常较典型，主要异常形态为“Ｕ”或“Ｎ”型。おhe vertical deformation characteristics and anomalous morphology prior to moderate earthquake of the Yishu fault zone and adjacent area are analysed using cross fault leveling data and long spaced leveling results. It is shown that the ground deformation near Yishu fault zone is mainly controled by neotectonic movement, the maximum rate of the fault vertical movement is 0.50mm/a, the synthetic value of its average rate is 0.34mm/a, which reflects the recent action of the fault zone is generally weak, and the movements of its north segment and NW fracture have the proper of opposite direction, and the tectonic movement of its south segment has a inheritance character, and the main anomalous morphologies prior to moderate earthquake of partial stations are U or N shape which is typical.

关 键 词：沂沭断裂带 垂直形变 异常分析 断层 

分 类 号：P542.3[天文地球—构造地质学]