Geochemical characteristics of surface water of Sredneotubinskoe oil and gas-condensate deposit
Main ion and microelement composition of surface water of Srednebotuobinskiy oil-gaseous-condensate field’ area is studied. Marsh moderate taiga landscapes are developed there. The river Ulakhan-Botuobuya and its tributaries Telgespit, Kyurgelekh, Tas-Yurekh are the main rivers of the area. Type of suface water is fresh magnesium-calcium sulphatic. Using ICP-MS and ICP-AES elements La, Y, Be and other rare microelements are fixed in water samples. Using liquid-scintillation spectrometry method <sup>3</sup>H content in water samples are determined. The technogenic pollution of surface water is revealed. According the authors opinion cavities of seven peaceful underground nuclear explosions are being the sources of microelements and technogenic radionuclides. Underground salty waters, enriched by radionuclides and microelements, infiltrate up through weakened near well’ zones, through zones of tectonic faults. Traps — intrusive rock are widespread in the area, and their cracked contact zones may be the third type of geological structure for radionuclides and microelements up moving.