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赣中变质岩带不是简单的一套震旦纪地层 ,而是由结晶基底中元古界中深变质岩系 (斜长角闪岩的Sm Nd全岩等时线年龄为 1113± 4 9Ma)和褶皱基底变质较浅的震旦系组成。两者之间以具热流体参与的混合岩化、韧性剪切带和递进变质三位一体组成的动热变质带接触。结晶基底经历了4期构造变质变形的叠加改造 ,每期构造变形都在变质岩石构造单元内留下各种变形形迹 ,变质作用表现为时间上的递进和空间上的叠加演化系列 ,是一套以众多的不平衡结构和多相共生混存的矿物组合 ,热变质带为一套动热变质塑性变形带 ,空间上依次形成绢云母—绿泥石带、黑云母带、石榴石带、十字石带以及夕线石带
The metamorphic belt in the middle Jiangxi area is not a simple set of Sinian strata. Instead, the middle-deep metamorphic rock series in the basement of the crystalline basement (amphibolite-amphibian Sm Nd whole-rock isochron age of 1113 ± 49Ma) And the fold basement metamorphic shallow Sinian composition. The two are in contact with hydrothermal metamorphic belt consisting of a mixture of petrified, ductile shear zones and progressive metamorphic units that are involved in thermal fluids. The crystalline base undergoes superposition and remodeling of the 4 stages of structural metamorphism and deformation. Each stage of structural deformation leaves a variety of deformational features in the metamorphic rock structural units, and metamorphism appears as a series of temporal progression and spatial superposition evolution, which is a Set with a large number of unbalanced structure and heterogeneous mixed mineral assemblage, the thermal metamorphic belt is a set of dynamic thermal deformation plastic deformation zone, the spatial formation of sericite - chlorite belt, biotite belt, garnet belt, Cross stone belt and the evening stone belt