基于水准与重力资料的首都圈地区形变分析

发布时间：2018-10-14 10:59

【摘要】：针对近年来首都圈地区形变分析手段的单一性,该文利用该地区2001、2007、2014年3期精密水准复测资料和2009、2014年两期流动重力数据,处理获得该地区2001—2007和2007—2014两个时间段的垂直形变特征和2009—2014年重力场累积动态变化特征,同时利用水准资料对同期重力变化结果进行垂直形变效应改正,获取校正后的重力场变化特征。实验结果表明:首都圈平原地区受华北地下水开采影响较为严重,垂直形变呈现明显的下沉现象,而在山区可以较为客观地反映构造运动信息。重力变化的垂直形变效应改正量基本在10×10-8(m·s-2)以内,对异常形态没有影响,研究区的重力场变化主要是对地壳深部介质密度变化和物质迁移过程的主要反映。
[Abstract]:In view of the singularity of deformation analysis in the capital region in recent years, this paper makes use of the data of precise leveling in 2007 and 2014 and two periods of mobile gravity data in 2009 and 2014. The vertical deformation characteristics of the region in 2001-2007 and 2007-2014 and the cumulative dynamic variation characteristics of gravity field in 2009-2014 are obtained by processing. The vertical deformation effect of the corresponding gravity variation results is corrected by leveling data. The variation characteristics of gravity field after correction are obtained. The experimental results show that the area of the capital circle plain is seriously affected by the exploitation of groundwater in North China, and the vertical deformation appears obvious subsidence phenomenon, while the information of tectonic movement can be reflected objectively in the mountainous area. The correction of vertical deformation effect of gravity variation is within 10 脳 10 ~ (-8) (m ~ (-2) and has no effect on the abnormal shape. The variation of gravity field in the study area is mainly a reflection of the density change of deep crustal media and the process of material migration.
【作者单位】：中国地震局第一监测中心;
【基金】：中国综合地球物理场观测—大华北项目(201508009) 中国地震局第一监测中心科技创新主任基金项目(FMC2016012)
【分类号】：P22

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