韧性剪切带的地球化学变异研究──以胶南造山带北缘剪切带为例

胶南造山带北缘剪切带，随着变形程度的增强，其构造岩的岩石化学成分发生明显的变异；在总结成分变异特征的基础上，分析了成分变异与体积变化、渗流流体作用的关系．确定了体积变化是造成构造岩成分变异的主要原因；同时存在大量的渗流流体作用，造成一些组分的迁移。在此基础上，讨论了花岗质构造岩在韧性变形过程中成分的迁移规律。

GEOCHEMICAL ANOMALIES IN DUCTILE SHEAR ZONES—AN EXAMPLE FROM THE MARGIN OF JIAONAN OROGENIC BELT

Along with the deformation becoming more and more intensive, great changes are noticed in chemical composition of the tectonites developed in the ductile shear zones on the margin of the Jiaonan orogenic belt. The relationship between composition anomaly, volume change and percolating fluid action is discussed in this paper. It is suggested that the volume change is the main factor leading to chemical composition anomalies of the tectonites. Meanwhile, an amount of fluid became active and mobile. Finally, the paper also deals with the regularity governing the migration of components in granitic tectonic rocks during the ductile deformation process.