NONAUTONOMOUS PHASES AS POTENTIAL SOURCES OF INCOMPATIBLE ELEMENTS

Abstract

The genesis of some deposits of noble and rare metals, which are extremely scarce in crustal and mantle rocks, attracts permanent interest of specialists in the field of ore formation. A new systematics of absorption of trace elements by real mineral crystals with participation of the so-called nonautonomous phases has been elaborated recently. By definition, the nonautonomous phases cannot exist independent of crystal surface in contrast to the common (autonomous) phases, which can be separated from the system without a change of their composition and structure and alteration of related phases.