京津文霸地区重力复测成果的地形变地下水校正  

THE CRUSTAL DEFORMATION AND GROUNDWATER CORRECTIONS OF THE REPEATED GRAVITY MEASUREMENTS IN BEIJING-TIANJIN-WEN'AN-BAXIAN REGION

作　　者：李天生[1] 范文[1] 杨金芬[1] 张琳 

机构地区：[1]国家地震局地球物理勘探大队

出　　处：《地壳形变与地震》1990年第3期68-75,共8页Crustal Deformation and Earthquake

摘　　要：本文介绍了对北京、天津、文安、霸县地区1980～1988年的重力复测成果所进行的地形变地下水的校正。分析认为:近几年天津点的重力值增大主要是因地面沉降造成的;经综合校正后,天津点的重力异常可基本排除,而任丘-保唐-沧州-带仍存在+80～100×10^(-8)m/s^2左右的趋势性异常。In this paper, the crusatal deformation and ground-water corrections of the repeated gravity measurements in Beijing-Tianjin-wen'an-Bax'an region are presented. It is considered by analysis that the increasement of gravity value at Tianjin observation piont was caused mainly by ground settling in recent years.The gravity anomaly at Tianjin observation point can be removed basically after corrections.However there is still trend anomaly about+80～+100×10^(-8)m/s^2 in Renqiu-Baotauang-Cangzhou region.

关 键 词：重力测量 地形变 地下水 校正 

分 类 号：P315.7[天文地球—地震学]