湖南株洲金管冲铀矿床成矿特征及成矿模式

Study on Metallogenic Characteristics and Prospecting Prediction of Jin'guanchong Uranium Deposit in Zhuzhou City in Hu'nan Province

摘要:

湘东金管冲铀矿床主要赋存于丫江桥复式花岗岩岩体的内外接触带中，在区域上主要受NNE—NE向的主断裂控制，其成矿受到多种地质因素的制约，研究矿床的各种控矿因素及其相互关系对矿床的找矿预测具有重要意义。通过对金管冲铀矿床外围地区岩心、钻孔数据的详细研究，分析了矿床的地层特征、构造特征、矿化蚀变、矿体形态、物质来源、地球化学特征等，总结了矿床的各种控矿因素及其对铀成矿作用的影响，特别是在矿床的深部和外围地区铀成矿所受到的制约因素，提出了本地区的铀成矿模式。根据矿床的成矿特征对本地区铀成矿有利部位进行了预测，指出在金管冲矿床及其外围地区，沿F1构造两侧均有较好的成矿潜力，特别是在矿床外围的高峰地区和大富岭地区是重要的找矿前景区。

Abstract:

Jin'guanchong uranium deposit in eastern Hu'nan province mainly occurs in the inner and outer contact zones of Yajiangqiao compound granite rock mass. It is mainly controllded by major faults with the trend of NNE—NE. The mineralization of this deposit is constrained by various geological factors. Studying controlling factors of the deposit and their inter relationships is of great significance for prospecting and prediction. Through detailed research on core samples and drilling data from the surrounding areas of Jin'guanchong uranium deposit, stratigraphic characteristics, structural characteristics, mineralization and alteration, ore body morphology, material sources and geochemical characteristics of the deposit have been analyzed. The various controlling factors of the deposit and their influence on uranium mineralization have been summarized, particularly the constraints on uranium mineralization in the deep and surrounding areas of the deposit. A uranium mineralization model has been proposed. Based on mineralization characteristics, favorable uranium mineralization zones in the area have been predicted. It is indicated that there is significant mineralization potential in Jin'guanchong deposit and its surrounding areas, and along both sides of F1 fault, especially in Gaofeng area and Dafuling area in the surrounding areas.