论太古宙含金剪切带的成矿机制

含金剪切带是长期发展演化着的宏大动力学体系。其成矿过程是个动态过程,受时间、空间和动力学、热力学等因素综合控制。含金剪切带发生于强变质变形高峰期或稍晚,含金石英脉是它发展演化的中晚期产物。含金剪切带不仅具有导矿、容矿作用,而且也是重要的造矿因素,在金的成矿作用链中导致矿化发生、促进矿化向成矿转化和控制就位起极重要的作用。绿岩的含金性、变质变形及伴随的重熔岩浆活动是金成矿必要条件,而含金剪切带及伴随的钾质花岗岩和碱交代、酸交代作用是金成矿的充要条件。

ON THE MECHANISM OF MINERALIZATION IN ARCHAEAN GOLD-BEARING SHEAR ZONE

The gold-bearing shear zone is a great dynamic system which is develo- ped for a long time. The process of mineralization is controlled comprehensively by dynamics, thermodynamics, time and space. The gold-bearing shear zone was developed duriag or after the peak of major metamophism developed during or after the pfeak of major metamophism and deformation, the gold bearing quartz vein was accurred in late stage of evolution of shear zone. The shear zone played an important role in the gold deposits forming process.Gold bearing greenstone, metamorphism, deformation and associated magma activity are neccessary to gold mineralization. Shear zone, alkaline metasomatism and acid metasomatism are also sufficient and necessary to the gold mineralization.