The QSP method is used to trace a limited number of flat density boundaries of a section; it does not require use any data on physical properties of rocks or any other a priori information. This method assumes that the position of quasisingular points of approximated potential fields (gravity, magnetic etc.) are defmed using a total normalized gradient: Quasisingular points usually coincide with section inhomogeneities, in particular with characteristics' of boundary microtopogaphy, that allows to trace their single intervals. The amplitude spectrum analysis of the anomaly allows to defme the approximate depth of gravity active section boundaries and to select optimal transformation parameters. Disturbing mass coordinates (quasisingular points) are defined by frequency-dynamic analysis of transformed function fields with the use of corresponding criteria. The QSP method can be applied to study inhomogeneities distribution pecularities both of a basement and the upper consolidated earth crust and the sediment section thickness. The data obtained should be used for the complex interpretation of independent geological-geophysical data, and for poorly studied regions they allow to obtain primary representation on the character of section inhomogeneities location.


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