基于TM和ASTER数据的萤石矿的遥感找矿研究——以内蒙古中北部地区为例  

Remote Sensing Exploration of Fluorite Ore Based on TM and ASTER Data—A Case Study of the North-central Region of Inner Mongolia

作　　者：王瑛雪 刘新星 张娟 成嘉伟 卢克轩 杨俊峰 WANG Ying-xue;LIU Xin-xing;ZHANG Juan;CHENG Jia-wei;LU Ke-xuan;YANG Jun-feng(Hebei GEO University,Shijiazhuang 050031,China)

机构地区：[1]河北地质大学河北省战略性关键矿产资源重点实验室,河北石家庄050031 [2]河北地质大学地球科学学院,河北石家庄050031

出　　处：《河北地质大学学报》2023年第2期1-11,共11页Journal of Hebei Geo University

摘　　要：内蒙古中北部是萤石矿的重要产出地,潜力巨大,但该地区属于偏远地区,地质工作程度低,制约了找矿工作的进一步开展。在充分分析李瑛萤石矿成矿条件和找矿标志基础上,选取ASTER卫星遥感数据,利用主成分分析法,提取与成矿有关的铁染羟基、碳酸盐化和硅酸盐化蚀变信息;利用Landsat 5和高分2号遥感数据,借助DEM地形渲染技术,结合地质构造的遥感解译标志,目视解译了容矿和控矿构造。最后,综合蚀变异常、线性构造等信息,圈定了3个成矿远景区。结果显示:围岩中的铁染羟基、碳酸盐化和硅酸盐化蚀变的异常信息是重要的找矿标志,同时NW向张性断裂是控矿构造,且蚀变异常信息与控矿构造密集区套合良好。据此,建立了该区的萤石矿遥感找矿方法,可依据此方法对硅酸盐岩石中的充填型脉状萤石矿床进行快速定位。The central and northern part of Inner Mongolia is an important producing area of fluorite ore with great potential,but this area is a remote area with low geological work,which restricts the further development of ore prospecting.Based on the full analysis of the metallogenic conditions and prospecting indicators of the Liying fluorite deposit,ASTER satellite remote sensing data were selected and principal component analysis was used to extract the information of iron dye hydroxyl,carbonation,and silicate alteration related to mineralization.Based on the remote sensing data of Landsat 5 and Gaofen-2,the ore-bearing and orecontrolling structures were visually interpreted with the help of DEM terrain rendering technology and combined with the remote sensing interpretation marks of geological structures.Finally,based on the information of alteration anomaly and linear structure,three metallogenic prospect areas were delineated.The results showed that:iron with hydroxyl of surrounding rock,carbonatization and salinization silicate alteration anomalies information is an important prospecting mark,NW to tensile rupture is also accused of mine construction,and alteration anomaly information and register good ore-controlling tectonic concentration areas.On this basis,the fluorite ore prospecting method is established,remote sensing can be based on the method of silicate rocks filling type vein fluorite deposit for rapid positioning.

关 键 词：萤石矿 TM ASTER 蚀变信息 构造断裂 

分 类 号：TP627[自动化与计算机技术—控制理论与控制工程]