Three-dimensional Inversion Of Gravity Survey Measurement Data

Gravity surveys is based on the difference in density between different rock(mineral)rocks in the earth's crust.By observing and studying the changing laws of natural gravitational fields,geophysical exploration and geophysical prospecting methods for finding useful minerals are identified.Not only applied to the study area and deep geological structure,but also applied to the study of local geological anomalies.The rock(mineral)rock density attribute is an important physical parameter reflecting the characteristics of the geological body.The density of the gravity field source body is closely related to the gravitational field.After obtaining the gravimetric field measurement data,in order to obtain the distribution characteristics and laws of the three-dimensional geological space,in order to achieve The purpose of solving geological problems finely,and carrying out three-dimensional density inversion and visualization methods have important theoretical values and broad application prospects.This paper focuses on the gravity measurement work carried out in the survey and evaluation project of the Hongliangzi copper polymetallic ore mine in Hami,Xinjiang,and carries out relatively complete data processing and three-dimensional inversion interpretation research.The paper first describes the geological background and geophysical characteristics of the mining area in detail,and provides theoretical basis for subsequent data processing and interpretation.Second,it focuses on the methods of gravity measurement,density determination,data processing,anomaly characteristics and anomaly inference and interpretation;The three-dimensional inversion theory and method are described.Through the introduction of space domain forward theory,meshing,objective function,data error,constraint inversion,and inversion calculation,the parameters involved in the inversion process are analyzed.After three-dimensional inversion of the residual gravity anomaly,the spatial distribution of the gravity source body and the anomalous source characteristics corresponding to each anomaly were analyzed.Finally,the high-precision magnetic survey was combined with the geological data to further the three-dimensional inversion results.Verification work.