诸广岩体南部寨湾铀矿成矿地质特征与找矿标志

Metallogenic Geological Features and Prospecting indicators of Zhaiwan Uranium Deposit in South of Zhuguang Pluton

通过对粤北百顺矿田寨湾铀矿成矿地质背景、控矿构造、含矿岩体、围岩蚀变及矿产特征的研究,运用热液成矿、走滑构造理论,阐述了寨湾铀矿的地质特征,并总结出找矿标志。研究认为寨湾铀矿床位于诸广山岩体南部,属花岗岩型铀矿床,矿(化)体受北东向百顺、牛澜断裂、北北东向大人山断裂和近南北断裂控制,为矿液提供运移通道和聚集场所。通过对寨湾铀矿深部探矿工程施工,见有工业矿体及矿化体,围岩蚀变发育,主要蚀变有硅化、赤铁矿化(红化)、绢云母化、紫-紫黑色萤石化、黄铁矿化、绿泥石化等,其中硅化、红化及紫黑色萤石化与成矿关系密切。

Through the study on the metallogenic geological background, ore-controlling structure and ore-bearing rock, rock alteration and mineral characteristics of Zhaiwan uranium deposit in Baishun Ore field, by using the theory ofhydrothermal mineralization and strike slip tectonics, expounds the geological characteristics of Zhaiwan uranium deposit, and summarizes the prospecting indicators. Study shows that Zhaiwan uranium deposit is located in South of Zhuguang pluton, which is a granite-hosted uranium deposit. Ore body is controlled by NE, Niulan Baishun fault and NNE Darenshan fault and SN fracture, providing migration and gathering places for ore fluid.Through the deep exploration of construction in Zhaiwan uranium deposit, industrial orebodies and mineralization, and wall rock alteration and development are seen. The main alterations are silicification, hematitization （red）, sericitization, violet-purple black fluoritization, pyritization, chloritization. Among them, the silicification, hematitization（red） and purple black fluorfossilization are closely related to the mineralization.