SOME THOUGHTS ON RELATIONSHIPS BETWEEN METAMORPHIC ANATEXIS AND PETROGENESIS-MINERALIZATION

Metamorphism is closely related with the origin and evolution of the Earth crust as well as petrogenesis and mineralization.According to the systematic kinetic analysis the processes from regional metamorphisms to migmatizations to metamorphic anatexis are the temperature-pressure progressive metamorphic processes.As an important part of the metamorphism processes, metamorphic anatexis has its own distinct temperature-pressure, thermodynamic, kinetic and geochemical characteristics.In this article the model of Metamorphic Anatexis System (MAS) is defined,which includes mass sources, energy sources, forms of act, mass transfer and concentration, petrogenetic age and locations.Case studies of metamorphic anatexis relating to granitoid rock are presented in the article to analyze their petrogenetic and mineralization mechanisms via examining the elements of MAS.The granitoid rock in Ailaoshan metamorphic rock belt and Yunkai metamorphic rock belt are determined as metamorphic anatexis petrogenesis.Pegmatite ore deposits and shearing zone gold ore deposits are closely related with metamorphic anatexis.The international geology community is paying greater attention to the metamorphic processes in the formations and mass transformations of ore deposits.It is both theoretically and practically significant to do intensive researches and investigations on the relationships between metamorphic anatexis and petrogenesis-mineralization.