DFG-B测汞仪与ATG-6138M测汞仪对比观测结果分析  

Comparative Study of Mercury Measurements from DFG-B and ATG-6138M Instruments

作　　者：郭丽爽[1] 刘耀炜[1] 张磊[1,2] 丁风和[3] 梁莹[3] 

机构地区：[1]中国地震局地壳应力研究所,地壳动力学重点实验室,北京100085 [2]中国地震局地球物理研究所,北京100081 [3]内蒙古自治区地震局,呼和浩特010010

出　　处：《震灾防御技术》2015年第3期615-620,共6页Technology for Earthquake Disaster Prevention

基　　金：地震行业科研专项(201308006)资助

摘　　要：为了核实赤峰1号井2014年初气汞异常现象,安装ATG-6138M测汞仪与原DFG-B测汞仪进行对比观测。ATG-6138M测汞仪观测到赤峰1号井房内空气汞浓度明显高于井孔内逸出汞浓度,表明观测井房可能存在汞污染问题。两台仪器同步观测井孔内逸出气汞浓度结果表明,ATG-6138M测汞仪测试结果稳定,动态清晰,而DFG-B测汞仪观测误差较大。对比DFG-B测汞仪与ATG-6138M测汞仪校准结果认为,DFG-B测汞仪已不能正常观测汞浓度的变化,存在捕汞管老化等仪器问题。综合分析表明,赤峰1号井DFG-B测汞仪存在环境汞污染和仪器老化等因素,且集气装置不符合地震行业标准技术要求,2014年初出现的气汞浓度异常信度不高,不能作为与地震孕育有关的前兆异常信息。In order to verify gas mercury anomaly in early 2014 from #1 well in Chifeng,we installed the ATG-6138 M mercury analyzer and compared the observations with the DFG-B mercury analyzer. The results of ATG-6138 M mercury analyzer showed that the air mercury concentration in the well room was significantly higher than the mercury concentration escaping from borehole,indicating that there may be mercury pollution problems. The two simultaneous observation instruments showed that ATG-6138 M mercury analyzer test results were stable and dynamic clearly,while DFG-B mercury analyzer produced more observation errors. The calibration of the two mercury analyzers showed DFG-B mercury analyzer could not properly measured the change of mercury concentration with the aging of mercury captured tube. Comprehensive analysis suggested that there exist mercury pollution and aging of DFG-B mercury analyzer, and the gas collecting device failed to meet the seismic standard technical requirement. The abnormal reliability of gas mercury concentrations anomalies in early 2014 may not be reliable,which could not be conceived as the earthquake precursory information.

关 键 词：气汞异常 DFG-B测汞仪 ATG-6138M测汞仪 对比观测 地震前兆 

分 类 号：P315.62[天文地球—地震学]