ON THE HYDROGENIC COMPONENT OF ALLUVIAL GOLD DEPOSITS

The data on ten gold fields located in different geological- and geoch emical-landscape conditions have been used to study the chemical redis tribution of gold in the sequence: source rock --> underground water - -> surface water --> gold deposit. Complex ions are the main form of g old in the underground water. The transition of ion-molecular gold int o colloidal and further into suspension forms takes place in the near- surface water flows. Small particles of virgin metals serve as seeds f or gold deposition from the solutions. Impurities of copper, zinc, lea d e.t.c. favor gold purification. The hydrogenic component is evaluate d to be high enough in the total mass of alluvial deposit.