(1. 成都理工大學(xué) 地球勘探與信息技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室，成都 610059；
2. 中國(guó)地質(zhì)科學(xué)院 成都礦產(chǎn)資源綜合利用研究所，成都 610041)
摘 要: 對(duì)于離子型稀土礦原地浸礦的開(kāi)采模式而言，礦體下方(花崗巖基底)發(fā)育的裂隙構(gòu)造(破碎帶)、地下暗河等滲漏通道，會(huì)嚴(yán)重降低離子型稀土礦的采收率，同時(shí)沿不良地質(zhì)體流出的浸礦液體還會(huì)造成環(huán)境污染，因此調(diào)查花崗巖基底破碎帶(滲漏通道)的發(fā)育狀態(tài)具有重要的意義。本研究針對(duì)福建省長(zhǎng)汀稀土礦C2勘探區(qū)的地層及構(gòu)造特征，設(shè)計(jì)了12條勘探剖面來(lái)完成高密度電阻率法測(cè)量的數(shù)據(jù)采集，并通過(guò)反演計(jì)算獲得了研究區(qū)的深部電性結(jié)構(gòu)模型。結(jié)果表明：勘探剖面較好地圈定了花崗巖風(fēng)化層的厚度以及深部斷裂構(gòu)造的空間展布特征，解釋結(jié)果與研究區(qū)布置的鉆探結(jié)果一致。勘探成果對(duì)于離子型稀土礦儲(chǔ)量評(píng)估、滲漏通道封堵及回收巷道的布置等提供了重要的參考資料。
關(guān)鍵字: 離子型稀土礦；高密度電阻率法；電性結(jié)構(gòu)；滲漏通道
（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
