一、引言在华南地区泥盆系与石炭系下统的碳酸盐岩地层中,已发现多处铀矿床及矿点,其矿化现象较复杂,有的在成岩阶段矿化基础上经受了淋积作用并以淋积成矿为主,有的有热水成矿作用迭加,甚至可能主要是热液产物;它们明显地受断裂构造控制,但又有一定的层位。人们对这些矿床的控制条件和成矿机理研究得还不够,但对断裂控矿的重要作用,认识比较一致。然而,构造仅仅是控矿条件之一,单用构造观点,远远不能说明矿床的形成条件。鉴 I. INTRODUCTION In the carbonate rocks of Lower Devonian and Carboniferous in southern China, many uranium deposits and ore deposits have been found, their mineralization is complicated, and some of them have undergone mineralization on the basis of diagenesis The deposition is dominated by leaching and mineralization. Some of them are superimposed by hydrothermal mineralization, and may even be mainly hydrothermal products. They are obviously controlled by the fault structure but have a certain horizon. It is not enough to study the controlling conditions and metallogenic mechanism of these deposits, but the understanding of the important role of fracture control is consistent. However, the structure is only one of the ore-controlling conditions, and the tectonic viewpoint alone can not explain the formation conditions of the deposit. Kam