【作者】 刘幼建； 谢焱石； 陈亮； 韩世礼； 胡杨； 谭凯旋；

【Author】 LIU You-jian;XIE Yan-shi;CHEN Liang;HAN Shi-li;HU Yang;TAN Kai-xuan;School of Nuclear Resources Engineering,University of South China;Fundamental Science on Radioactive Geology and Exploration Technology Laboratory,East China Institute of Technology;

【机构】 南华大学核资源工程学院； 东华理工大学放射性地质与勘探技术国防重点学科实验室；

【摘要】 旨在以矿石结构与成矿作用的关系为切入点,以粤北302花岗岩型铀矿床为研究对象,采用二维岩石薄片法对铀矿石中石英颗粒的形态进行了周长-面积（P-A）分形分析。结果表明,所有样品的分形分析拟合度R²均达到0.929 9以上,表明所有岩矿石样品中的石英颗粒P、A具有明显的分形关系,分维值D_PA介于1.006 4和1.301 6之间;样品中U和SiO₂含量越高,石英颗粒P-A分维值D_PA越大,D_PA越可以很好地指示花岗岩热液蚀变和铀矿化作用的程度。更多还原

【Abstract】 In order to understand the relationship between ore structure and uranium mineralization,two dimensional thin-section methods is applied to Perimeter-Area（P-A） fractal analysis for the quartz morphology of the uranium ores from No.302 uranium deposits in the north Guangdong.The results indicate that all fitting’s degree of fractal analysis can reach above 0.929 9 and the fractal dimension values D_PA is 1.006 4 to 1.306 6,which shows that there is an obvious relationship between perimeter and area of quartz particles in all ore samples.The higher content of U and SiO₂ in the sample along with the larger D_PA of the quartz morphology will give the credit to that the higher D_PA can well indicate the extent of granite hydrothermal alteration and uranium mineralization.更多还原