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Adsorption is advanced as a principal factor in the distribution and fractionation of minor constituents in minerals. The effects of adsorption on the processes of nucleation and crystal growth are considered as important factors in controlling compositional relationships between coexisting minerals and possibly determining certain mineral assemblages. The possibility that adsorption during crystal growth may cause slight disequilibrium conditions is indicated. The changes of the trace element content in certain metamorphic rocks between different metamorphic facies are illustrated, and the possibility is discussed that such metamorphic transformations may provide a liberation of ore-forming materials.
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George W. DeVore (1955) studied this question.
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