The Research Of Integrated Geophysics For Geothermal Resources In The Changbai Mountain Basalt Covered Region

Our country is rich in geothermal resources,Changbai Mountain is a famous active volcano,volcanic activity is very frequent in the new generation,there are a lot of hot springs in the area,which contains abundant geothermal resources.Changbai Mountain area is covered by basalt.In order to study the thickness of basalt cover,the structure and structure of basalt,and the structure of typical hot spring,We conducted a study on electrical prospecting in Changbai Mountain area.Firstly,a large number of geological and geophysical data in Changbai Mountain area are studied,and the tectonic units,regional stratigraphy,fault structure and geophysical characteristics are studied,Based on these studies,this paper analyzes the geothermal types and geothermal geological conditions in Changbai Mountain area.Then,this paper studies the electromagnetic field theory,and makes a study on the all-time apparent resistivity correction in the near source problem of the controlled source audio magnetotelluric sounding(CSAMT),and the shadow effect and the effect of the source copy are also discussed;On the inversion,we study the one-dimensional and two-dimensional Occam inversion theory.Through the establishment of different forward models,the forward model is used to do one and two dimensional inversion,Comparison of the results of inversion,summed up the law,and finally draw conclusions.The typical hot springs spa Xianrenqiao are briefly introduced and controlled source audio frequency magnetotelluric sounding,the resistivity structure Xianrenqiao hot springs;The high density resistivity method was used to measure the distribution of basalt in Jinjiang;The audio frequency magnetotelluric(AMT)measurements were carried out for the Linjiang Laosandui hot springs.Deepening the understanding of the effectiveness of typical hot springs and geophysical exploration methods.In order to investigate the resistivity structure,thickness and structure of basalt in Changbai Mountain area,the CSAMT survey was carried out in Changbai Mountain basalt area.Based on the analysis of the inversion results of CSAMT in several regions,the structure of the underground resistivity of the Changbai Mountain basalt covered area is studied.Finally,the reliability of the CSAMT inversion results is verified by the log data.