Advances on the texture and genesis of phenocryst plagioclase zoning

Plagioclase is one of the most common rock-forming minerals in igneous rocks. Various types of zoning texture are developed in phenocryst plagioclase due to the hosted rock types and the different rock-forming physicochemical conditions. The zoning composition and texture patterns have been widely used in the study of magmatic evolution and the inversion of magma mixing. Simple zoning, rhythmic zoning and eroded zoning are defined as three types of zoning texture of phenocryst plagioclase in this paper. In terms of shape characteristics of erosion core, the eroded-type zoning texture is further divided into intracrystalline erosion texture and intercrystalline erosion texture. The different core-erosion textures in intracrystalline erosion texture and the different edge-shapes of the core in intercrystalline erosion texture are sketched out. The crystallization mechanism for different types of zoning textures of plagioclase minerals are summarized. The research on the plagioclase zoning texture and the characteristics of core, mantle and rim are significant implication for understanding magmatism process.