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Impact of accuracy in data on the inversion of gravitational anomalies
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 17th International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2018, Volume 2018, p.1 - 5
Abstract
The research is devoted to the influence of accuracy of data on gravitational inversion. The purpose of the work was to determine the conditions for true determination of the geometry of gravitational sources for anomalies with noise. The method was to perform the inversion of the values of acceleration of gravity from three bodies of model section for three layers in two-dimensional version. Novelty is related to the definition of the percentage limit for the approximation between initial and calculated anomalies for data with noise in apparent density. An analysis of the gravitational inversion is made for the mass displacement algorithm and the genetic method. The practical significance is to determine the errors in the gravity data that need to be given for precise inversion. The method is used to interpret gravity data on sulphide deposits from Canada’s Northwest Territories. The inversion result is close to the drilling data. Knowledge of the influence of errors on gravitational data allows performing more reliable evaluation of the cut by density distribution, which is important for geological, search and environmental tasks.