Geochemistry of Epigenesis

Geochemical barriers and element retention in soils in different landscapes of the Tianshan Mountain area, Xinjiang, China

“…The size of a GB varies from a few centimeters long in a soil pedon to several kilometers within certain geomorphic landscape, and each type can be further divided into subtypes based on the local landscape environment. Since the GB concept was enacted, many geochemists have studied the conditions of element migration and accumulation related to metallogenesis (Fortesue, 1980;Perel'man, 1975;. However, few soil scientists have used the concept to study spatial variability of soil elements and its relationship to agricultural production and human health.…”

“…1016/j.geoderma.2004.10.008 described an accumulation of selected elements in a deciduous forest due to actions of humus. The concept was later integrated and systematically defined by Perel'man (1975), a Russia geochemist and referred to a epigenetic zone where the conditions of elemental migration were distinctly altered, resulting in a substantial accumulation of selected elements. GBs are predominantly mechanical, physiochemical and biological in nature corresponding to the retention mechanisms of elements or chemical substances such as physical entrapment, chemical retention and biological fixation, respectively (Perel'man, 1975).…”

“…The concept was later integrated and systematically defined by Perel'man (1975), a Russia geochemist and referred to a epigenetic zone where the conditions of elemental migration were distinctly altered, resulting in a substantial accumulation of selected elements. GBs are predominantly mechanical, physiochemical and biological in nature corresponding to the retention mechanisms of elements or chemical substances such as physical entrapment, chemical retention and biological fixation, respectively (Perel'man, 1975). The size of a GB varies from a few centimeters long in a soil pedon to several kilometers within certain geomorphic landscape, and each type can be further divided into subtypes based on the local landscape environment.…”

Geochemistry of natural waters – The legacy of V.I. Vernadsky and his students

“…Perelman developed the methodology of this science and the areas of its concern as being: geochemical classification of natural landscapes, element migration (mechanical, physical-chemical, biogenic and technogenic), classification of geochemical barriers, paleogeochemistry and historical geochemistry of landscapes, landscape-geochemical mapping (Perel'man, 1961(Perel'man, , 1975(Perel'man, , 1986.…”

Geochemistry of a New Zealand nephrite weathering rind

“…Na, K, Ca, Mg) with high ionic potentials are sufficiently moderately mobile to be effectively leached from silicate (or carbonate) minerals in rocks to form mobile cations in water (Davis & DeWiest 1966;Perel'man 1967;Whittacker & Muntus 1970). In contrast, Fe, Al, Ti and Cr are typically immobile (insoluble) under such conditions; thus, they should remain and therefore become enriched in weathered rocks.…”