大别山金寨重力基线场混合重力测量试验与分析  

ANALYSIS FOR SYNTHETIC ADJUSTMENT OF ABSOLUTE AND RELATIVE GRAVITY OF JINZHAI GRAVITY BASELINE IN DABIE MOUNTAIN

作　　者：徐如刚[1,2,3] 张新林 梁霄[1] 孙鸿博[1] 储飞[1] 黄显良[1,3] 谈洪波[4] 汪健 XU Ru-gang;ZHANG Xin-lin;LIANG Xiao;SUN Hong-bo;CHU Fei;HUANG Xian-liang;TAN Hong-bo;WANG Jian(Anhui Earthquake Agency,Hefei 230031,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;Anhui Mengcheng National Geophysical Observatory,Mengcheng 233500,China;Institute of Seismology,China Earthquake Administration,Wuhan 430071,China)

机构地区：[1]安徽省地震局,合肥230031 [2]中国科学技术大学,地球和空间科学学院,合肥230026 [3]安徽蒙城地球物理国家野外科学观测研究站,蒙城233500 [4]中国地震局地震研究所,武汉430071

出　　处：《地震地质》2023年第5期1147-1169,共23页Seismology and Geology

基　　金：蒙城地球物理国家野外科学观测研究站联合开放基金(MENGO202107,MENGO202310);中国地震局地震科技星火计划项目(XH19019Y);安徽省“十三五”防震减灾重点项目;国家自然基金面上项目(42074172)共同资助

摘　　要：在地震重力区域监测网数据处理过程中,相对重力仪的格值标定和基准控制通常采用本网内的绝对重力基准值,由于仪器格值和控制基准的影响相互耦合,难以定量分析格值、基准控制对测网数据平差处理的影响。文中基于大别山金寨重力基线场的混合重力测量数据,解耦了格值、基准控制的影响,获得了金寨重力基线场的初值。结果表明:金寨重力基线场可以满足安徽地震重力测网仪器标定的需求,对提升监测效率、节约经济成本具有重要意义,也可为其他基线场、地震重力区域监测网数据处理提供参考。In the data process of the regional gravity monitor network,the absolute gravity reference value is the control datum of the gravity monitor network and is usually used for calibrating the scale of the relative gravimeter.Due to the coupling influence of the gravimeter scale and the control datum,it is difficult to quantitatively analyze their influence of on the adjustment processing of the regional gravity monitor network data.Based on the hybrid gravity observation data of the Jinzhai gravity baseline field in Dabie Mountain,the paper decouples the influence of the relative gravimeter scale and gravimetry control datum.According to analyzing the average point value,the point value,section difference,and the accuracy,we obtain the influence of the gravimeter scale and control datum on data processing of the regional gravity monitor network.The initial gravity value of the Jinzhai gravity baseline corresponds to the optimal combination of the gravimeter scale and control datum and the following conclusions are obtained:(1)The results of the mutual difference of gravimeters,section difference,and their accuracy calculated by different combinations of gravimeter scale and control datum show that the control datum is of great significance to reduce the inter-difference between gravimeters and obtain reliable measurement results,and the control datum used to the gravimeter scale calibration should form a complete coverage of the reading range of the regional gravity monitor network.(2)Gravity point values and their accuracy of the Jinzhai gravity baseline calculated by the different combinations of gravimeter scale and control datum show that the point values and accuracy are both affected by the gravimeter scale and control datum.When the solution point is located at the end of the control datum and the solution point is used as the control datum and participates in the solution calculation,the influence of the control datum and gravimeter scale on the solution is the same.When the solution point is not used as the

关 键 词：混合重力测量 格值 基准控制 金寨重力基线场 大别山 

分 类 号：P315.726[天文地球—地震学]