The model of formation of anomalous structures of geochemical fields during formation of thermo-fluidic ore-forming system is proposed. The morphology of these fields is caused by the combination of diverged mineral zonation in relation to a power source and converging zonation in relation to the centers of an ore deposition. Influence of tectonic conditions of functioning of hydrothermal system on an internal structure of anomalous geochemical fields is shown. Connection of efficiency of hydrothermal deposits with structure of a geochemical field containing them is grounded
