The Study Of Gravity Fieldinversion

The main content of this article is the inversion of gravity field. Gravity field isone of the most important geophysical fields. Density structure underground can beobtained from the inversion of the earth’s gravity field. It is of great significance for theresearch of regional tectonics and sedimentary basins and as the auxiliary constraintinformation of other exploration methods.The density structure is an important research content in geophysical inversion.We determine the density structure of the anomaly source depending on the gravityanomaly obtained from the observation space. Currently, the inversion of densityinterface is mostly limited to the single interface inversion. However, the graduallydeveloped multi-density interfaces inversion methods, such as stripping, directinversion method and other methods, are more complicated and have stronglydependence on the prior knowledge.The aims of the article were to establish a grid model and generate the discrete gridof research area. We carried out forward modeling using the accumulation effect of thegravity field. Then we intended to use the simulated annealing method to obtain theinversion iterative solution based on the forward model. In order to verify the accuracyand stability of the iterative inversion method, we selected the simulated annealingmethod with global optimization ability models to obtain the inversion iterativesolution against different2D. During the process of the research, we analyzed coreideas and principles of the simulated annealing method. On this basis, thecorresponding simulated annealing programs were written to verify the inversion ofabove2D models. The analysis and interpretation of the inversion results verified thatthis algorithm was feasible for the inversion of gravity field.Finally, a real gravity line across the Longman Mountains was selected tocomplete the real data processing of the underlying density interface of this region,combining with other relevant exploration information. Combined with the inversion results, the density distribution and the deep structure of this area were analyzed.