韧性剪切带中金成矿机理浅析

韧性剪切带中金成矿的研究已涉及到不同方面。目前的研究成果认为剪切带有利于金富集成矿有四个方面:(1)剪切带作为金由深至浅迁移的通道;(2)剪切作用形成了有利于金富集的构造;(3)剪切过程有利于水—岩反应,形成有利于金富集的物理—化学环境;(4)剪切应力可使低应力载金矿物发生富集作用。此外,剪切带中常、微量组分的定量研究以及剪切作用的实验模似研究,是当前研究剪切带中金成矿机理的重要方面。

THE METALLIZATION OF GOLD DEPOSIT IN SHEAR ZONE

Why does gold deposit occur in the ductile-brittle shear zone? Basing on present researching results the reasons are as follows : (1) Shearzone can be as a channel through which gold can be mobile from deep to shallow; (2) During shearing actions gold is reactived from original rocks and enriched in some favorable places; (3) Water-rock reaction formed a environment for gold settling and (4) Shear stress forced gold and bearing-gold minerals into shear failures. The composition changes of rocks in shear zone and experimental study are two important aspects for tracing the mechanism infuture.