Gravity Potential Field Processing And Transforming Using An Equivalent Source Approach And Imaging Research

The ultimate purpose of geophysical exploration,geophysical field is according to the obtained information(abnormal)to calculate the space position,caused by the underground source body the abnormal size,shape,physical parameters,the work of known geophysical inversion.At present,there are many kinds of inversion methods,but all of them have multiple solutions.In order to overcome or reduce the multi solution of inversion,this is a problem that has been discussed and studied for a long time.In this paper the two-dimensional gravity potential field inversion by equivalent source two-dimensional plate model,calculate the quality and image,to obtain information on the distribution of underground source body caused by the gravity anomaly,and determine the spatial location,shape and size,physical parameters etc..The forward model used in 2D inversion is usually used as a horizontal cylinder model,and the fitting of the horizontal cylinder for any cross section is far less than that of the two-dimensional plate.Firstly,in depth study on gravity exploration,inversion theory,equivalent source method theory and technology basically,and then write to 2D board as the equivalent source inversion model calculation program,first respectively in vertical plate,inclined plate,gravity polygon section simulation test and a series of theoretical analysis;in the inversion,the design and arrangement of the equivalent source of single and multilayer research,design of single-layer equivalent source inversion results to geological body horizontal stack separated,and can determine the geological occurrence;multilayer can determine the spatial location,shape and size of the geological body,etc..At the same time,we focus on the inversion imaging with terrain,and its effect is better than that of terrain.The accuracy of the inversion and the potential field(upper and lower extension)calculated by inversion are verified.Finally,the research results are applied to the inversion of gravity anomaly in a mining area.According to the results of the inversion quality imaging,the ultrabasic rock bodies related to the chromite are roughly delineated,which provides a favorable target for the exploration of chromite.It is proved that the results of this study have good theoretical significance and practical application value.