相山邹家山铀矿区某钻孔岩心高光谱蚀变矿物特征及地质意义

Hyperspectral Alteration Mineral Feature and its Geological Significance of Drill Core in Zoujiashan Uranium Deposit of Xiangshan orefield

文章基于高光谱蚀变矿物提取方法,利用邹家山地区某钻孔岩心的高光谱数据进行蚀变矿物提取和编录,提取的蚀变矿物主要有富铝水云母、贫铝水云母、绿泥石、蒙脱石、碳酸盐、地开石、高岭石。其中水云母化、绿泥石化、赤铁矿化与铀矿化密切相关;富铝水云母在钻孔上部含量多而下部含量减少;贫铝水云母在钻孔上部含量少,而在下部尤其是矿化段含量明显增多,不同蚀变矿物分布形态不同且不同部位蚀变矿物组合不同,反映了矿区经历了不同期次和性质的热液活动。

Based on hyperspectral mineral extraction method and hyperspectral data of a drill core from Zoujiashan deposit,this study extract altered minerals for geologic logging.The extracted minerals include low aluminium hydromica,high aluminium hydromica,chlorite,smectite,carbonate,dickite and kaolinite.Among them,damouritization,chloritization and hematitization are closely related to uranium mineralization.The high aluminium hydromica was rich in the upper part but become poor in the lower part of the drill core,while the low aluminium hydromica is poor in upper but rich in lower part of the drill core,especially in mineralized section.Different altered minerals have different existing forms and distribution depth and different in mineral combination.They all indicated that the drill area experienced different period and characters hydrothermal activity.