Geophysical processes and biosphere: article

Аnnotation: A new look at the formation of ore oxide-hydroxide cobalt-manganese rinds on guyots - with the participation of deep endogenous heat is presented in the article. The main factor in the formation of cobalt-manganese rinds on guyots is the thermo-density convective dynamics of metal-bearing deep oceanic over the areas of endogenous water heat inflow. Due to the introduction of bioelements by such waters to the surface of the water area, the deep convective cell I: 1) stimulates expanded reproduction of plankton in the waters enriched with atmospheric oxygen in the upper part of the photic layer; 2) initiates the density dynamics of waters above the guyots (forms a convective cell II), which appears due to the immersion of waters to the surface of the plateau; decomposition of dead organisms along this path and anomalous enrichment of this water flow with metals; 3) the formation at the guyot surface of water flows of the barrier zone at the contact of ascending oxygen-containing and descending abnormally metal-bearing, oxygen-depleted (redox ore-controlling barrier). Thus, the convective system ensured the preliminary bioconcentration of Mn, Fe, Co, and other metals in the waters above the guyots, the delivery of these waters to the surface of the guyots plateau, and the subsequent hydrogenic concentration of metals in the cobalt-manganese rinds deposited in the barrier zone. The accumulation of cobalt in guyot ore rinds is ensured by the increased accumulation of manganese in them or in separate layers composing them, on the oxides and hydroxides of which cobalt is selectively sorbed.