基于精密水准数据的苏鲁皖地区垂直形变特征  

Vertical Crustal Deformation Characteristics in Su-Lu-Wan Area Based on Precise Leveling Data

作　　者：田晓[1] 郑洪艳[1] 苏广利[1] 孙启凯[1] 畅柳[1] 王家庆[1] 

机构地区：[1]中国地震局第一监测中心,天津300180

出　　处：《华北地震科学》2017年第3期27-31,共5页North China Earthquake Sciences

基　　金：中国综合地球物理场观测--大华北地区(201508009);中国地震局监测;预测;科研三结合课题(CEA-JC/3JH-163711)

摘　　要：利用苏鲁皖地区1985年、1995年和2016年3期水准复测资料,进行带有GPS点约束的动态平差,计算垂直运动速率。根据垂直运动速率、计算的梯度值以及主要活动断裂剖面,分析苏鲁皖地区近30年的垂直形变演化特征。结果显示:苏鲁皖地区以继承性运动为主,山东地区整体隆升,江苏地区以下沉为主,并且变化比较明显;结合历史地震和梯度图,得出该区域高梯度区对4~5级地震具有一定的反映。The rate of vertical movement is calculated using the leveling data surveyed in 1985 , 1995 and 2016 in Su-Lu-Wan area, conducting dynamic adjustment with constraint of several GPS points. The evo-lutional characteristics of vertical deformation in Su-Lu-Wan area in recent 30 years are analyzed basing on the vertical movement rate, the gradient and the profiles of some main active faults. The result shows that inherited movement is the primary activity in Su-Lu-Wan area with a rising movement in Shandong and a sinking movement in Jiangsu, and the changes are obvious. The relationship between the historical earth-quakes and the gradient maps indicates that the areas with high gradient have a certain reflection on the M4 - M 5 earthquakes.

关 键 词：精密水准 苏鲁皖地区 垂直形变特征 约束平差 梯度 

分 类 号：P315.7[天文地球—地震学]