Anomalous changes in concentrations caused by dispersion halos are often comparable in their parameters with fluctuations of the geochemical background and with its changes due to changes in rocks. In these cases, it is necessary to use a method of processing the survey results in which the geochemical background, carrying information about the geological structure or about regional geochemical patterns, is separated from the field of measured concentrations, and local anomalies of prospecting interest are identified.

Based on the theoretical analysis of the distribution of element concentrations in residual dispersion halos of vein-shaped ore bodies, R. I. Dubov proposed using specially calculated nomograms of theoretical curves constructed on a semi-logarithmic scale for interpreting the halos. Interpretation using nomograms, as is known, consists in superimposing the experimentally obtained curve, constructed at the same scale, on one of the theoretically calculated curves. A disadvantage of the nomogram method of interpretation is the need for interpolation between neighboring curves on the nomogram. The similar character of curves with different parameters can lead to ambiguity of the solution.