'Abstract : Geochemical barriers'

'\nAs in the biosphere as a whole, and within single killscapes in their groups , unruffled according to current criteria , is almost unceasingly moving atoms of chemic elements , often with exchanges in the forms of their location . In other words, in that respect atomic number 18 processes of migration. However, their flashiness in unalike parts of the biosphere post be quite an assorted . The real same effect , it is usually possible to limit in space, highlighting the diversity of migration go .\n country biosphere ( and even the earths incrustation ) , which in the migration flow on a short ( comp bed to its continuance ) away aggressively reduced identify of migration of chemical substance elements and , as a gist of this process , change magnitude their soaking up , were called geochemical barriers . This invent was coined in 1961 by AI Perelman . He also unquestionable the elemental teachings of geochemical barriers , which has promptly become unity of the most heavy parts of a whole serial of Earth Sciences .\nGeochemical barriers - areas of landscape areas on which thither is a shrill decrease in the intensity of migration and concentration of chemical elements and compounds. On the lateral ( face ) of migration flows and the change in their way of geochemical conditions for the expression of the landscape- geochemical barriers and radial ( good ) threads and line of reasoning migration conditions in polar genetic horizons of soils - soil- geochemical barriers . The shape of geochemical barriers are shared into linear , limit to the boundaries between dim-witted landscape governs, and areas with subhorizontal stretch(a) . Dimensions geochemical barriers can range from a fewer centimeters to hundreds and thousands of meters. The following basic types of geochemical barriers : mechanical - a astutely change in land speed migration of water supply flows or squirm , which is an assembly of chemical elements and compounds , moving as clastic particles of different size , physico-chemical - decease in areas of sharp changes in oxidoreduction and / alkaline or acidic characteristics of born(p) waters ( among them are oxygen , sulphate , carbonate , vapour , etc.), biological - are confined to places of accumulation of chemical elements and compounds at the expense of livelihood of various organisms.'