CONTENTS AND MIGRATION FORMS OF ELEMENTS IN NATURAL-WATERS OF THE MID-TOM BASIN

The subject of study is microcomponent composition and forms of migrat ion in surface and underground waters of the upper hydrodynamic zone o f the mid-Tom' basin. It has been shown that average concentrations of some components in ground waters are somewhat higher than the values earlier established for southern West Siberia. The deviations are main ly due to wide development of gleyish geochemical setting and to abund ance of pyritized sedimentary rocks and coals. Data on ratios of disso lved and suspended forms of element migration in underground and surfa ce waters have been obtained. Among them the colloid form of migration is predominant for some metals. It is supposed that the oxidation pro cesses running when samples of underground waters come in contact with the air likely have an effect on the ratio of colloid and dissolved f orms of migration. It is established that the microcomponent compositi on of underground waters of the region under study is only slightly af fected by man-induced factors.