The Characteristics Of Deep Electrical Structure And Dynamics With Central Asian Orogenic Belt

Central Asian orogenic belt neibour on the Siberian craton in the north,the North China Craton and Tarim Craton in the south,and int the Phanerozoic it occurred strong continental crust proliferation and transformation process.The magnetotelluric sounding data,which is collected in Inner Mongolia,Jilin,Hebei and other places of three NW-SE lines,is to be used in the paper.We use such as remote reference processing technique ? the impedance tensor decomposition technique? magnetic induction vector analysis technology and phase tensor analysis techniques to processe MT data in fine processing.And using advanced two-dimensional inversion method of 2D inversion for MT data,getting the model of the shell mantle range two-dimensional conductivity structure.According to the obtained two-dimensional conductivity structure model,this paper systematically analyzed the electrical structure characteristics in different tectonic units and important fault belt.In the north margin of North China Craton crust mantle electrical structure has the characteristics of the horizontal and vertical stratification ";Ergun landmass resistivity characteristics of complex,del cloth to dry break for the sector can be divided into two parts: East and West;Xing'an landmass conductivity structure with high resistance as the main feature;the Solonker suture Zone crust mantle electrical structure of complex,which-upper crust with high resistance characterized,composed of a number of large-scale high resistance blocks and high resistance body bottom face buried deep obvious ups and downs,the high resistance layer is electrical cascade shapes of the zone of separation for horizontal is not continuous high resistance block.The conductive structure model on multi display for electric anomalies or distortion of important fault zone in the study area.Source tower-like GUI Tuqi fracture belt is Ergun landmass and Larix continental block boundary faults,del cloth stem fracture zone is Ergun continental block of important fault belt,the ore controlling,mineralization and shell in low velocity high conductive layers are closely related.There is bidirectional subduction of the paleo Asian Ocean traces in the Solonker suture zone,there are two stages of the southward subduction.Daxinganling region under the difference of crust and upper mantle depth of crust mantle structure in the electrical structure of the internal reasons,whereas in the causes and to the west of the Pacific plate subduction and mantle heat flow in the deep earth of closely related.Hailar Basin and Erlian Basin of the vast underground low resistivity body formation causes and water exist,sources of water in addition to the dehydration of hydrous minerals,and ancient Okhotsk ocean closed about.