Application Research Of Aeromagnetic Data In Anshan-Ji'an Area

In our twentieth century,the use of ground magnetic method to explore the search for magnetite technology,has developed more shape,the magnetic method in the search for outcrop iron ore application is already started.Magnetic observation of the observation accuracy from the past 10 n T development to the current 0.1n T or even 0.01 n T or so precision.At the beginning of this century,aeronautical magnetic measurements have gradually developed into a conventional magnetic method.The main reason is that the aeronautical magnetic test is more efficient and has the information quantity,which can weaken the humanized magnetic field interference and the weak reliability characteristic of the weak magnetization to a certain extent.Anshan-Ji'an area belongs to the area of Liaoning and Jilin in the eastern part of the region,the area has Anshan iron ore area,Jiyan metal mine distribution.As the magnetite and the metal mine have relatively strong magnetic properties,the magnetic field difference between the ferromagnetic body and the surrounding rock mass is significant.It can be seen that the study area,the use of aeromagnetic data to explore the magnetite,the division of tectonic units,as well as to infer the fracture location,a more good geophysical basis.In this paper,the magnetic anomalies in Anshan-Ji'an area are used to find the magnetic anomalies,and these anomalies are processed.According to the collected geological data and the other exploration results are used to separate the effective magnetic anomalies and eliminate the other causes Invalid anomalies,combined with the local geological conditions of these effective magnetic anomalies for comprehensive geological interpretation.Specific work with the main results are as follows:(1)to establish a theoretical model to verify several conventional magnetic anomaly separation methods,such as upward extension,trend analysis,interpolation cutting and other methods in the magnetic anomaly separation of the application effect and applicability.(2)to establish the theoretical model to verify several boundary recognition methods,such as vertical derivative,NSTD,oblique derivative and other methods for boundary recognition of the scope of application and advantages and disadvantages.(3)The method is applied to the aeromagnetic data processing in Anshan-Ji'an area,and the magnetic anomaly field is separated by the method of upward extension,interpolation cutting and multi-scale wavelet analysis.The vertical second derivative is used to analyze the signal And the residual magnetic anomaly.The distribution of magnetic geology in Anshan-Jian'an area is deduced.The location and occurrence of the area are determined by the method of oblique derivative,horizontal derivative and graph method.(4)According to the above results,it is deduced that the target area of the high-magnetic anomaly.