geochemical processes

This work is analysed of conditions of a sedimentation has shown, that their changes are connected to increase of an outlet of biogenic matters and transferring from eutrophic to hypertrophic phase of development of basin at last decades. The geochemical consequences of pollution on a shelf are shown in summer activization of reduction conditions, decrease pH of deposits, presence of aboriginal hydrogen sulphide.

Considers modern geochemical characteristics of migration processes in pollution northwestern Black Sea shelf. Bulk precipitation suspension occurs on geochemical barriers "river-sea" or on the shelf outside the aver-age wave field. The main factor limiting the migration of solutes are the processes of biological absorption.Using cluster analysis, multidimensional establish substantial divergence component ratios depending on the time of observation. On the example of cadmium tendency to accumulate the most mobile of toxic components in the carbonate sediments of the shelf.