3D Researches of the Upper Mantle Using Results of 2D Direct Gravity Data Interpretation

The direct gravity 2D-interpretation using the quasisingular points method along a set of regional profiles within the central part of the European Russia is carried out. The large information about location of sources of anomalies in various deph ranges, including the upper mantle, is received. Unfortunately, it was possible to estimate an accuracy of their position only with the help of the crossing profile. The analysis of some parameters allows to assume that all sources of anomalies in the upper mantle (or their majority) to the same surface are belonging. For definition of a confidence interval and for the graph of dependence of quantity of anomalies sources from depth relative error 10% was used. According to this graph, depth ≈ 100km is especially emphasized. The same graph was used for a choice of isolines for the map of the upper mantle inhomogeneities, which is for the first time drawn up and submitted here. There is an obscure meaning of a physical sense of anomalies sources - whether they are connected to a change of substance, or to a change of density, or to a change of density gradients.