Abstract:
The iron and manganese content in marine water is very small but the volume of ferromanganese nodules
contributes 30% of the total mass of polymetallic nodules and crusts in marine and ocean floor. This
suggests that the process of enrichment of ferromanganese crusts and nodules is not only contributed by
chemical processes but also by oceanographical and biological processes. The article indicates the initial
results of analyzing oceanographic, biological, and environmental features to understand their roles in the
growing ferromanganese crusts and nodules and to predict the distribution of ferromanganese crusts and
nodules in the East Vietnam Sea. As a result, ferromanganese crusts and nodules in the East Vietnam Sea
can be distributed in the continental slopes, where upwelling and downwelling currents occur, to ensure
enough dissolved oxygen concentration for the enrichment of ferromanganese crusts and nodules as well as
to meet required conditions for microbial activity, which is involved in these processes. However, due to the
limitations of the results of studying the enrichment of ferromanganese crusts and nodules in the East
Vietnam Sea, the paper just shows the prediction of the distribution of ferromanganese crusts and nodules.
Thus, it is necessary to carry out the expedition for enrichment processes of ferromanganese crusts and
nodules and to determine the factors that impacted the growing ferromanganese crusts and nodules in the
East Vietnam Sea.
