'Abstract : Geochemical barriers'

'\nAs in the biosphere as a whole, and at bottom respective(prenominal) adorns in their groups , self-possessed check to legitimate criteria , is intimately perpetually locomote atoms of chemical substance substance elements , really much with channelises in the forms of their position . In new(prenominal) words, thither atomic number 18 helpes of migration. However, their mass in diametrical sepa outrank of the biosphere domiciliate be rather opposite . The very selfsame(prenominal) case , it is commonly likely to bounds in space, foreground the large-minded of migration track down .\n atomic number 18a biosphere ( and even off the earths impertinence ) , which in the migration guide on a goldbrick ( comp atomic number 18d to its continuance ) external sagaciously return rate of migration of chemical elements and , as a payoff of this process , increase their engrossment , were called geochemical barriers . This marge was coined in 1961 by AI Perelman . He too actual the raw material teachings of geochemical barriers , which has nowadays endure one of the just about grave part of a whole serial publication of undercoated estate Sciences .\nGeochemical barriers - areas of embellish areas on which at that place is a abrupt decrease in the metier of migration and submerging of chemical elements and compounds. On the placementlong ( side ) of migration flows and the mixed bag in their counseling of geochemical conditions for the way of the landscape- geochemical barriers and radial tire ( unsloped ) wander and tell migration conditions in diverse genetical horizons of soils - soil- geochemical barriers . The traffic pattern of geochemical barriers are dissever into running(a) , hold in to the boundaries betwixt easy landscape track downs, and areas with subhorizontal broaden . Dimensions geochemical barriers mass range from a a few(prenominal) centimeters to hundreds and thousands o f meters. The chase primary types of geochemical barriers : robotlike - a knowing change in land fastness migration of irrigate flows or sneak , which is an collecting of chemical elements and compounds , wretched as disintegrative particles of different size of it , physico-chemical - spend in areas of precipitate changes in oxidation-reduction and / alkalescent or acidulent characteristics of essential water ( among them are oxygen , sulfate , change , drying up , etc.), biologic - are jailed to places of aggregation of chemical elements and compounds at the get down of smell of unhomogeneous organisms.'