Download Geochemistry of Epigenesis by Aleksandr I. Perel’man (auth.) PDF

By Aleksandr I. Perel’man (auth.)

In its classical feel "epigenesis" refers to all geological techniques originating at or close to the outside of the earth. It therefore embraces all these phenomena which we go together with the land­ scape; Perel'man has already written broadly in this topic. The panorama, within the actual feel, is managed by way of the interac­ tion of exogenic and endogenic agencies-on the only hand, the atmo­ sphere, the wind, the rain, and different parts of the elements, the forces of operating water and the planetary controls of gravitational and tidal nature; and nevertheless the fabrics of the earth's crust, from sediments to metamorphic rocks and igneous fabrics from deep endogenic assets. In sensible phrases the epigene area consists of the goods of weathering, the soils, the transported fabric, the colluvium of hillsides, and the alluvium of flow valleys. It includes these landforms which are items of the erosional sculpturing of the panorama, in addition to those who end result from accumulation, corresponding to glacial moraines and desolate tract sand dunes. The technological know-how of geomor­ phology is progressively commencing to evolve from a passive cataloging of surroundings and its deduced motives (in the Davisian feel) right into a full of life research of dynamic approaches. those are partially geophysical, within the experience of hydraulics and mechanical reports, and partially geo­ chemical.

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Geochemistry of Epigenesis

In its classical feel "epigenesis" refers to all geological approaches originating at or close to the outside of the earth. It hence embraces all these phenomena which we go together with the land­ scape; Perel'man has already written broadly in this topic. The panorama, within the actual feel, is managed through the interac­ tion of exogenic and endogenic agencies-on the single hand, the atmo­ sphere, the wind, the rain, and different parts of the elements, the forces of working water and the planetary controls of gravitational and tidal nature; and however the fabrics of the earth's crust, from sediments to metamorphic rocks and igneous fabrics from deep endogenic assets.

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The factor by which the given concentration C should be multiplied to obtain the activity is known as the coefficient of activity, f. Thus, a = fC. Since this coefficient is equal to 1 only for extremely dilute solutions, the activity equals the molar concentration. The ionization power of a solution is a measure of the intensity of the electric field which conditions the size of the coefficient of activity. It is denoted by the letter fL. = c,zi + C2Z~ + ... + cnz~ 2 where the C's are ionic concentrations and the Z's are ionic valences.

10 MnSO. K2CO. ZnSO, 544 Na2CO. ·4H 2O Tl 2CO. AgNOs l'JiSO. 380 Na2WO. B,O, 342 LiF Li 2SO. ·7H 2O 207 CuSO. 1 g/Uter CaSO. H~~O, Sr O. CaCO•. MgCO. 43 PbF. )a • 2HP SiO. 001 g/liter PbSO. BaSO. Hg2C1. AgCI MnCO. COs FeCO. BaCO. Caco3 PbCOs SrCO. 041 Mn(OH). 10- 3 Mg(OH). 10- 3 Ni(OH). 065 Co(OH). 10- 2 AlP. 0001 g/liter FeSt PbS ZnS CuS Cu 2S HgS Ag2 S Ti0 2 AgJ PbCrO. 016 GEOCHEMICAL PARAMETERS OF ELEMENTS 33 NaZS04, and Na ZC0 3 are respectively more soluble than Ca3(P04h, CaS04, or CaC0 3.

005 and their active concentrations are not equal to the actual concentrations. An increase in the mineralization of natural water lowers the coefficient of activity and the active concentration of the ions. The solubility of difficultly soluble salts improves in the presence of some foreign salt. 3 g/liter. This phenomenon is known in chemistry as the salinity effect. It should be taken into account during salinity studies in deserts and semideserts. It speeds up the migration of many elements.

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