赣杭成矿带中段鹅公山火山盆地铀成矿潜力分析

发布时间：2018-05-25 21:52

本文选题：地面伽玛能谱测量 + 因子分析　；参考：《东华理工大学》2017年硕士论文

【摘要】：赣杭成矿带是我国主要十大铀成矿带之一,其产铀矿区域跨度长,范围广。该铀成矿带自西向东形成8个铀矿化集中区和53个铀矿床,鹅公山火山盆地是8个铀矿化集中区之一,也是重点调查评价的火山盆地。项目组选择工作程度较低,矿(化)点密集产出的鹅公山火山盆地中东部地段,进行1:5万地面伽玛能谱测量(376km2)。本文以鹅公山火山盆地为研究对象,结合铀成矿地质背景,分析了盆地内三个铀矿床和众多铀矿(化)点所处的铀成矿地质环境,导矿、控矿构造特征。通过对研究区内地面伽玛能谱测量资料整理,分析了区域内铀、钍、钾含量背景、场晕分布特征、控制因素和与铀矿化的关系。进而应用因子分析法,以2km2为一单元,将研究区划分成188个单元,求取各单元内铀、钍、钾及其特征参数的平均值、均方差等,建立相关矩阵,进行数据分析。计算出各单元的铀源因子和矿化因子得分情况,圈定出区域内铀源因子和矿化因子得分等值图,提取与铀矿化相关的多元信息。通过对已知矿床所处单元对比分析,推断潜在有利的铀成矿单元,进而选定了黄巢寨和王家两处为铀成矿有利地段。对上述两处具有铀成矿潜力地段,重点开展了更精细、大比例尺(1:1万)地面伽玛能谱测量,深入调查、研究了黄巢寨和王家地段的放射性元素场晕分布形态、控制因素及与铀矿(化)点空间关系,厘定了找矿靶区四处,并对其铀成矿潜力进行了分析、研究。
[Abstract]:Ganhang metallogenic belt is one of the ten main uranium metallogenic belts in China. Eight uranium mineralization concentration areas and 53 uranium deposits were formed in the uranium metallogenic belt from west to east. The Gegongshan volcanic basin is one of the eight uranium mineralization concentration areas and is also the volcanic basin which is the focus of investigation and evaluation. The project group selected the central and eastern part of the Gegongshan volcanic basin, where the working degree is relatively low and the mining (chemical) points are concentrated, and measured the gamma energy spectrum of 1: 50 000 ground level by 376km2. Taking the Gegongshan volcanic basin as the research object and combining with the uranium metallogenic geological background, this paper analyzes the characteristics of uranium metallogenic geological environment, ore-conducting and ore-controlling structure of three uranium deposits and many uranium ore (chemical) points in the basin. The background of uranium, thorium and potassium contents, the characteristics of field halo distribution, the controlling factors and the relationship between uranium mineralization and uranium mineralization in the study area are analyzed by means of the data collected from the surface gamma spectrum measurements. Then, using factor analysis method and 2km2 as a unit, the study area is divided into 188 units, the average values of uranium, thorium, potassium and their characteristic parameters, the mean square deviation and so on are obtained in each unit, and the correlation matrix is established and the data are analyzed. The scores of uranium source factor and mineralization factor of each unit are calculated, and the equivalent map of uranium source factor and mineralization factor score in the area is drawn, and the multivariate information related to uranium mineralization is extracted. By comparing and analyzing the units in which the known deposits are located, we infer the potentially favorable uranium ore-forming units, and then select Huangchaozhai and Wangjia as favorable uranium metallogenic sites. For the two uranium-forming potential areas mentioned above, we have carried out more precise, large scale (1: 10 000) ground gamma energy spectrum measurements, investigated them in depth, and studied the halo distribution of radioactive elements in Huangchaozhai and Wangjia areas. Based on the control factors and the spatial relationship between uranium deposits and uranium ore points, the location of prospecting targets is determined, and the uranium metallogenic potential is analyzed and studied.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P619.14

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