ИСТИНА

Heterogeneous state of hydrothermal ore-forming fluid is an important factor of ore deposition since it can cause sedimentation of dissolved metals and lead to formation of industrial ores. Fluid heterogeneous state can appear by different ways. Usually its formation from homogeneous one is considered (boiling or branch of dissolved gases). However the principally another way of heterogenic fluid formation is quite real: by passing of the gas through the liquid. Such process is called "barbotage", it is easy-to-realize technically and is used in series of technological processes. The role of barbotage in hydrothermal ore deposition wasn’t discussed by now, probably due to absence of indicators of such phenomena. But there aren’t grounds for the impossibility of such phenomenon in hydrothermal systems. Contrarily, the hypothesis of the barbotage participation can explain some particularities of ore-forming processes at hydrothermal deposits of different types. Barbotage is broadly used in technologies for heating and mixing of aggressive liquids, as well as for solutions scavenging. Barbotage generates the gas emulsions and leads to formation of large interfacial area at liquid - gas interphase boundary. It promotes the intensifications of heat- and mass-exchange processes and deeper gas - liquid chemical interaction. Spontaneous formation of scores of small bubbles can cause a cavitation. Barbotage facilitates also the flotation process. The signs of barbotage passing in some natural hydrothermal ore-forming systems are shown in report.