(1. 成都理工大学 地球勘探与信息技术教育部重点实验室，成都 610059；
2. 中国地质科学院 成都矿产资源综合利用研究所，成都 610041)
摘 要: 对于离子型稀土矿原地浸矿的开采模式而言，矿体下方(花岗岩基底)发育的裂隙构造(破碎带)、地下暗河等渗漏通道，会严重降低离子型稀土矿的采收率，同时沿不良地质体流出的浸矿液体还会造成环境污染，因此调查花岗岩基底破碎带(渗漏通道)的发育状态具有重要的意义。本研究针对福建省长汀稀土矿C2勘探区的地层及构造特征，设计了12条勘探剖面来完成高密度电阻率法测量的数据采集，并通过反演计算获得了研究区的深部电性结构模型。结果表明：勘探剖面较好地圈定了花岗岩风化层的厚度以及深部断裂构造的空间展布特征，解释结果与研究区布置的钻探结果一致。勘探成果对于离子型稀土矿储量评估、渗漏通道封堵及回收巷道的布置等提供了重要的参考资料。
关键字: 离子型稀土矿；高密度电阻率法；电性结构；渗漏通道
（1. Key Laboratory of Earth Exploration and Information Technology of Ministry of Education, Chengdu University of Technology, Chengdu 610059, China;
2. Institute of Multipurpose Utilization of Mineral Resources, Chengdu 610041, China）
Abstract:For the mining of ion type rare earth (ITRE) by in-situ leaching, the fracture structure, underground river and karst cave developed beneath the ore body, will become leakage pathways for the leaching liquors to escape and seriously reduce the recovery rate of ITRE. In addition, the leach liquor along leakage pathways will also cause environmental pollution. Therefore, it is of great significance to study the deep structures and identify the leakage pathways. Aiming the stratigraphic and structural characteristics of the C2 exploration area of Changting rare earth mine in Longyan, Fujian province, China, twelve exploration sections for completing data acquisition of the multi-electrode resistivity method measurement were designed in this study, the deep electrical structure model of the study area was obtained by inversion calculation. The results show that the exploration sections delineate the thickness of the granite weathering layer and the spatial distribution characteristics of deep fault structures well, and the interpretation results are consistent with the drilling results laid out in the study area. The exploration results provide important reference for the reserve evaluation of ion type rare earth ore, the sealing of leakage pathways and the layout of recovery pathways.
Key words: ion type rare earth ore; multi-electrode resistivity method; resistivity structure; leakage pathways
