塘湾矿床铀矿化特征及成因浅析

Analysis of uranium mineralization characteristics and genesis in Tangwan deposit

塘湾矿床矿体产出主要受城口断裂及其次级构造控制,铀矿化类型以硅质脉型为主,碎裂蚀变岩型次之。铀矿化与硅化、赤铁矿化、黄铁矿化等蚀变关系密切,构造交汇区是成矿的有利部位。初步分析铀源主要来自塘湾岩体,深部热液浸取富铀岩体中的铀形成含矿热液,在地壳浅部沉淀成矿。

The occurrence of Tangwan deposit is mainly controlled by Chengkou fault and its secondary structure,the types of uranium mineralization are mainly siliceous vein type,followed by cataclastic altered rock type.Uranium mineralization is closely related to alteration such as silicified,hematite,pyritization.The intersections of fault structures are more favorable to uranium mineralization.The uranium have been derived from Tangwan granite,deep hydrothermal leaching of uranium from uranium rich rock forms ore-bearing fluid which is deposited and mineralized in the shallow part of the crust.