Genesis of water of hydrothermal deposits of Subpolar Urals

The genesis of hydrothermal deposits is largely determined by the source and genesis of ore-forming fluids. To identify the genesis of gold deposits and quartz deposits of Subpolar Urals we held isotope studies of hydrogen (dD) and oxygen (d 18O) of water and gas phases from fluid inclusions of the ore-syngenetic minerals. We present data on the isotopic composition of oxygen and hydrogen of waters of modern hydrothermal systems, dD and d 18O of water from fluid inclusions of other hydrothermal deposits of the world, and the isotopic composition of the waters of their possible sources (meteogenic, buried, metamorphogenic, «juvenile»). It is shown that the ore-forming solutions of Subpolar Urals deposits, as well as other hydrothermal deposits, are predominated by water with meteogenic genesis and water of dehydration of OH --containing minerals.