In the supergene zone of the earth’s crust, chemical elements migrate at low temperatures and pressures. This zone may extend for several thmisand meters below the surface. It is underlain by a zone of metamorphism, which, in turn, is underlain by a zone of magmatism. The name “supergene” was coined by Fersman (1934), who considered it to be a zone of various surface and near-surface phenomena such as the formation of soils, weathering, sedimentation, etc. Here, the term will be used exactly in that sense.* It should be mentioned that the processes of the supergene zone are in contrast to those of the hypogene zone, which occur at high temperatures and pressures.
KeywordsChemical Element Original Process Epigenetic Process Continuous Influx Supergene Zone
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