The article covers findings of the research on very clayey sands of the gold placer in the stream Mad, Primorsky Krai. The sands of the gold placer studied proved to be rather compli-cated for disintegration and subsequent enrichment owing to high content of dispersed factions, iron oxides, and the clay mineral montmorillonite and have low dynamics of reducing elastic properties under water saturation. To solve the problem of disintegration of very clayey sands with low dynamics of deformation properties under water saturation the authors justified the need for further research into processes based on conversion of the kinetic energy of the fluid flow in the energy of acoustic oscillations with a sequential combination of additional hydrodynamic effects including jet division.
