Study On The Electrical Structural Characteristic Of Erdos Plots And Theextracting Standard Points Data From Magnetotelluric Data

Erdos plots is located between the North China plate?Southern China plate and The Qinghai Tibet Plateau.Erdos plots is a part of the North China Craton.Erdos plots play an important role in North China during the Cenozoic and modern tectonic activity.It is very important for us to learning structure and historical evolution of the North China.This paper is based on the national program of "Deep Exploration Technology and Experimentation" set up the project of "Experimental Study of the Continental Standard Grid of Electromagnetic Parameters(SinoProbe-01)",a 10 × 10 MT array based on Northern China will be laid out,aiming to process the 2-D inversion of"NLCG" with the data of 6 MT profiles in the areas of Erdos after data processing.In the comprehensive comparative study on the 6 sections of electrical structure model,we can get a basic understanding of the Erdos plots.Erdos plots have a better Layered characteristics,in accordance with the "electric distribution model of low-high-low".Shallow buried deep in less than 10 kilometers,is mainly low resistance sedimentary.Crust depth is about 40 kilometers,the upper crust is mainly granodiorite granite dioritic gneiss,diorite composition;the lower crust lithology is mainly composed of granodiorite granulite,TTG,acidic eclogite clip mafic granulites,so the whole is a large high resistance layer.In the mantle section,to 38° north latitude as the boundary,the southern and Northern Electric structure discrepancy,southern resistivity is higher in the northern,resistivity is 2 orders of magnitude.Geological data Erdos plots and 2D,3D inversion results,the main cause for the low resistivity layer is salt fluid,another is the partial melting.At the same time,the high resistance layer,prevent the escape of salt fluid.its movement in the presence of low resistivity layer in a large number of mantle Erdos block may be provided.The resistivity of underground rock and stratum related to many influencing factors,so it has a certain range of the resistivity value of different rock.By the results of calculating the forward and inverse model,there are big errors between the resistivity value of inversion and the ture resistivity value of rock.So author hope to find some statistical methods that synthesize the resistivity value of each layer to the standard value and the standard value are close to the true value of underground rock resistivity.At the same time to join the confidence interval,author can kown the floating range of each layer resistivity value.standard points provide a reference for the research of underground electrical structure.