FEATURES OF COPPER MIGRATION IN THE DISCHARGE ZONE OF HYDROTHERMAL SOLUTIONS (MID-ATLANTIC RIDGE, 13° N.)
Several geophysical and geochemical anomalies have been found around the Ashadze-2 hydrothermal vent. Based on the results of CTD sounding, two types of complex geophysical anomalies were identified. Thermodynamic modeling has shown that dissolved copper in the depths of the hydrothermal system migrates mainly in the form of chloride complexes, and in the discharge zone and scattering halo - in the form of a carbonate complex and a Cu2+ ion. Turbidity anomalies formed at a depth of 3000-3100 m are accompanied by background concentrations of dissolved copper. Elevated and abnormal concentrations of dissolved copper were found below turbidity anomalies in several layers of bottom waters around the source at depths of 3200-3250 m.