河北昌黎台多极距观测数据和地下结构分析  

Multiseparation Array Earth Resistivity Observation Data and the Underground Structure of the Changli Station

作　　者：郭建芳[1] 周剑青[1] 佟鑫[1] 王晶晶[2] 张思远[1] 

机构地区：[1]河北省地震局秦皇岛中心台,河北秦皇岛066100 [2]辽宁省地震局盘锦地震台,辽宁盘锦124010

出　　处：《地震工程学报》2016年第A02期190-196,共7页China Earthquake Engineering Journal

基　　金：中国地震局地震科技星火计划青年项目(XH15005Y)

摘　　要：利用河北昌黎台近一年的多极距观测数据,分析各个测道的年变特征,发现随观测极距的增大,各测道年变特征也不尽相同,体现了降雨对年变低点相位的影响随地层深度增加而滞后的特点。同时将多极距观测值与理论值进行对比分析,发现观测误差均小于1,上两层误差略大于下三层。结合该台站最新打井资料,利用电测深数据反演,得到昌黎台新的电性结构模型:h1=2.6m、ρ1=36.0Ω·m;h2=14.4m、ρ2=528.6Ω·m;h3=75.8m、ρ3=38.5Ω·m;h4=∞、ρ4=817.0Ω·m,与历史文献略有差别。Using multiseparation apparent resistivity observation data obtained from the Changli station in the recent year,the annual variation characteristics of each observation channel is analyzed.We observe that when distance between the observation channels increases,the annual variation characteristics differ.The observed data is compared with the theoretical value,and the error is less than one;the error of the first and the second layer is larger than that of the subsequent layers.Finally,we combine the inversion observation data with the latest drilling data from the Changli station to develop a new electrical structure model.

关 键 词：地电阻率多极距观测 年变动态特征 地下结构层反演 昌黎台 

分 类 号：P315.75[天文地球—地震学]