高空间分辨率遥感数据在离子吸附型稀土矿山调查中的应用

Investigation of Ion-absorbed Rare Earth Ore Using High Resolution Remote Sensing Data

为更好地监测离子吸附型稀土矿山的开采现状,选取赣南离子吸附型稀土矿区,采用最新高分辨率遥感数据,开展离子吸附型稀土矿矿山非法开采监测、环境破坏监测、矿山动态变化监测等示范研究。运用IKONOS数据结合矿权资料在赣南寻乌地区开展稀土矿山非法开采监测;在赣南寻乌地区提取土地荒漠化及水体污染等环境信息;利用两期QuickBird数据在赣南定南某矿区开展动态变化监测。研究表明高空间分辨率遥感数据处理与分析为离子吸附性稀土矿矿山快速、准确、动态监测提供了良好的技术手段。

Unauthorized mining of ion-absorbed rare earth ore deposits have become more and more serious with rising of the price of rare earth,and the mining of rare earth ore leads to a series of environmental problems.The quick and accurate investigation of mining has thus become government administrators' major concern.To solve the problem of investigating the ion-absorbed rare earth ore,south Jiangxi areas were selected as the study area,and high resolution remote sensing data was used for investigation.Investigation study includes three aspects,which were unauthorized mining,environmental pollution and change monitoring.Unauthorized mining investigation was conducted in Xunwu area using IKONOS data.The interpretation criteria were built,and unauthorized mining areas were delineated with the help of the mining right data.Then environmental pollution investigation was studied in Xunwu area using IKONOS data.Land desertification was extracted using spectral angle mapping method,and the water pollution level was identified in four classes using ISODATA classification method.Finally,change monitoring was studied in Dingnan area using two periods of QuickBird data,and the reduction and increase of mining areas were calculated using remote sensing and geographic information system analysis.The results indicated that high resolution remote sensing processing can provide a good method for quick,accurate and dynamic investigation of ion-absorbed rare earth ore.