ON THE PECULIARITIES OF EARLY SEDIMENT DI AGENESIS OF THE ATLANTIC-OCEAN IN THE BENGEL UPWELLING ZONE BASED ON SEDIMENT AND POREWATER CHEMICAL-ANALYSES

The peculiarities of early sediment diagenesis in the Bengel upwelling zone (Atlantic ocean) are revealed at the base of chemical analysis o f variable valent chemical elements in sediments involved in redox red istribution processes. Limits of dissolved component contents in porew ater are compared with the corresponding flux parameters at the sedime nt - water interface. Using a stationary diagenesis model of the hydro gen sulfide distribution in the porewater the sulfate reduction reacti on rate was calculated. The latter value was found to be in agreement with reference data. In certain sediments the balance of oxidised and reduced sulfur forms was found to be constant in the process of sulfat e reduction in the porewater.