The Research On ?T Three-component Conversion Method Of Strong Magnetic Anomaly

In recent years,gravity and magnetic exploration technology has achieved rapid development,and has entered the stage of multi-parameter high-precision measurement and refined data processing.Accurately acquiring the three compo nents of magnetic anomalies can increase the reliability of the inversion results,and can also increase the spatial understanding of magnetic anomalies based o n the direction information of the space vector field,which is the basis of pos t-processing conversion.In this paper,the three-component conversion method of strong magnetic anomaly ?T is studied.First,the total intensity magnetic anomaly ?Tpro and the modulus differen ce total intensity magnetic anomaly ?Tmud projected in a strong magnetic envir onment are evaluated.There are obvious errors.Secondly,the three components of the magnetic anomaly are converted by conventional frequency domain met hods,and the results are evaluated.The conventional frequency domain method can be used to obtain a better conversion result when the total intensity magn etic anomaly ?Tpro is converted into three components,but the error of the co nversion conversion result obtained when the total intensity magnetic anomaly i s the modulus difference is relatively large.Finally,the equivalent source meth od was used to study the three-component conversion of the total intensity ma gnetic anomaly ?Tmud.The equivalent source method is a commonly used data processing method,which can transform a complex potential field into a simple forward calculati on.The process is relatively simple and it is convenient for unified processing.In this paper,when carrying out the research on the equivalent source method,the effect of the setting of the equivalent source parameters on the settlement results was first studied through model experiments;secondly,the effect of different methods for solving the equations was evaluated,and finally the conjuga te gradient method was selected as the equivalent source for this paper The m ethod of the equation system;finally,the three-component magnetic anomaly o btained by the conversion of the equivalent source method is evaluated,and it is concluded that the equivalent-source method has a higher accuracy when de aling with the magnetic anomaly of modulus difference ?Tmud converted to the three-component conversion.