А 3-<$E D> gravity modelling of the Earth's crust has been made for the area including the Korosten Pluton and surrounding structures. A three-layer crustal model has been used in calculations: upper layer (0 - 5 km); middle layer (5 - 18 km), and lower layer (from 18 km to the Moho-discontinuity). In this model, geological and petrological data and the results of a recent interpretation of the DSS profiles II, VI and EUROBRIDGE-97 have been taken into account. The density parametrization within the calculated layers is carried out by employing the data on the densities of subsurface rocks for the upper layer and those on the seismic velocity-density interdependence for the middle and lower layers. In the SE part of the Korosten Pluton, the dense block is situated. The density values change from 2,92 g/<$E roman cm sup 3> at the 18 km depth to 2,95 at the crustal base. In the northern part, the block of abnormally low density (2,61 - 2,63 g/<$E roman cm sup 3>) is situated. The obtained density parameters can be an important constituent for the analysis of tectonic processes in the Korosten Pluton crust.

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