The Application Research Of Vector Characteristics Of Magnetic Anomaly And Conjugate Inversion

In magnetic exploration,the anomaly caused by magnetic source is mainly studied.The spatial distribution of the magnetic anomaly is not only affected by the geometric shape and dominance of the magnetic source itself,but also by the magnetization direction.The positive and negative size distribution of the anomaly is influenced by the distance between the observation point and the magnetic source body,and can even cover the magnetization direction to a certain extent.The distance between the two is directly affected by the ups and downs of the terrain,and has different effects on the different abnormal components.In this article,we first research the variation of the curve shape of the main section of the different anomalous components(Za,Ha,Ta)of several common two degree bodies(horizontal cylinder,infinite,finite and horizontal plate,step)is under the influence of several common terrain(Val ey,ridge and single slope)and different magnetization directions,such as the size and location of the peak with the terrain changes,the peak two sides of the curve of the attenuation and the extension of the positive and negative conditions,etc.,At the same time,a summary and a method to estimate the depth of the magnetic body and the geometric size under the specific conditions are presented in this article.Secondly,according to the property of the power series expansion formula,the principle of selecting the origin of the calculation method is explained briefly by using the conjugate complex field strength,and the influence of position and number of data points to effect of interpretation is made a brief description.On the basis of this,the different models are used to verify this interpretation method respectively: The Taylor series method is used for the infinite deep thin plate and thick plate;the horizontal cylinder adopts Laurent series method.Then,through the model verification,the relative deviation of the explanatory parameters in different terrain and different values is discussed.At the same time,the sensitivity of each parameter to the value position is analyzed simply under certain conditions.In the research of thick plate,it is found that although the methods in some papers can be used to calculate the thickness of the plate,the application conditions have some limitations.Therefore,on the basis of previous studies,this article has improved the idea of thin plate to make it more suitable for general application conditions,and the deviation analysis is made for different halfwidth and depth ratio.Finally,it is applied to the magnetic data in a mining area,which shows that it has practical application value.