Abstract
Valence dipolarization is an important factor and one of the basic rules governing the formation of the earth’s crust, the evolution of ultrabasic-basic → intermediate-acidic → ultraacidic rock series, magmatic differentiation of igneous intrusions and the distribution and concentration of rare and radioactive elements in igneous rocks, and orthomagmatic metallogenesis. Ichor, transmagmatic fluids or ascending thermal fluids from the upper mantle, produced by dehydration, degassing, dealkalization, desilication and the loss of heat are all exclusive valence dipolarizing agents within the earth. Ca- and Mg- skarns are products of anti-valence dipolarization. Alkaline metasomatism is regarded as valence dipolarization in the hydrothermal stage.
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