Research And Application Of The Method Of Separating Anomalous And The Structure Boundary Identification With The Date Of Gravity And Magnetic

Gravity and magnetic exploration is an important method of geophysicalexploration methods, the Interpretation of Gravity and magnetic data is the foundationof regional geological studies, Which not only be by means of gravity and magneticexploration of large-scale regional tectonic studies provide a general positive reference,but also can provide an important basis for the thickness of sedimentary geologyexploration problem, dividing the basin and fracture resolution and so on. In the gravityand magnetic exploration, Measured data are combined of regional and local anomalies,extracting abnormal information must be divided superimposed anomalies, Thus,gravity and magnetic anomaly separation method is one aspect of gravity and magneticexploration indispensable. And, in the process of the Interpretation of Gravity andmagnetic data, judgment on the location of the geological body, etc., need to rely ontectonic boundary recognition technology. Therefore, tectonic boundary identificationis also a very important part of gravity and magnetic exploration, also an important partof the theory of gravity and magnetic interpretation. Based on this, the main researchcontents are as follows:First, the gravity and magnetic anomaly separation methods-Interpolation cuttinganomaly separation method is systematically studying theoretical and experimentingmodel. show that the method has practical effect in abnormal separation process, then,analysis and summary the radius of the cutting and cutting precision. Secondly, madeindividually theoretical research and model experiments to several basic boundaryidentification methods(The Total Horizontal Derivative、The Vertical Derivative、TheAnalytical Signal Amplitude、The Tilt Angle and horizontal gradient and The ThetaMap), and compared the actual effect of various methods, summarizing theidentification and the pros and cons of various methods. Furthermore, studiedtheoretical basis and principle of the method to the Self-autocorrelation filter. And then,Experimental Analysis of each individual model and combination model, summarized that the Self-autocorrelation filter can highlight the local anomalies under thebackground field, can reflection of the position of anomalies accurately,however, thereare still some true position and lack of bias. Finally, the following method is applied tothe gravity and magnetic data processing of Wanan basin, there are derivativecalculation, NVDR_THDR, The Tilt Angle and horizontal gradient, The Theta Map,the Self-autocorrelation filter. The treatment results were compared with results ofprevious studies,It provides further reference to Wanan basin lineament analysis.