Titlebook: Geochemistry of Epigenesis; Aleksandr I. Perel’man Book 1967 Plenum Press 1967 chemistry.desert.erosion.geochemistry.hydraulics.sediment.s

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W. Schultz,G. Frhr. Seherr-Tho?We find different stages of physicochemical, mechanical, or biogenic migration in the history of every chemical element. These modes of migration are closely interrelated, the role of any given process varying with the element.

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Analysis of Energy Involved in Supergene Migration,Supergene processes involve, as do all other natural processes, the transformation of matter and energy. Any geochemical investigation should be concerned with both sides of a given process of migration.

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Factors in the Development of Media in the Supergene Zone,Within the supergene zone, the properties of natural media and the course of epigenetic processes are affected by two factors: the climate and the geologic structure.

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Geochemical Barriers,Lithologic boundaries in the supergene zone where conditions of migration change drastically and concentrations of chemical elements begin to rise are called geochemical barriers.