滇黔相邻区二叠系宣威组富稀土黏土岩综合研究进展

The Research Progress and Problems of Rare Earth Elements of Rare Earth Rich Clay Rock Permian Xuanwei Formation in the Yunnan-Guizhou Border Region

在滇黔相邻区峨眉山玄武岩之上,二叠系宣威组下部广泛分布一套富稀土黏土岩。作为一种新类型的潜在稀土资源,诸多学者对其进行了研究,包括成矿条件、赋存状态,富集规律、综合利用方式等多个方面都有了较大的进展。该类型稀土具有非常大的资源潜力,区域连续性好、集中程度高,富含高价值的稀土元素镨、钕、铽、镝,经济价值和开发利用潜力巨大。本文全面总结了宣威组稀土目前的研究进展和存在的关键问题,提出了下一步研究方向。当前对于宣威组富稀土黏土岩中稀土元素的富集机理尚未明确,进一步开展成矿理论研究是找矿突破的关键;赋存状态的研究亟待突破,对该新类型稀土的综合利用技术突破,后期绿色勘查开发具有重要的意义;综合利用方面,经济可行的绿色选冶技术、伴生的铝、铌、锆、镓、钛等有价元素的综合回收、尾矿的资源化消纳等方面是下一步的主攻方向。

A set of rare earth rich clay rocks is widely distributed in the lower part of The Permian Xuanwei Formation and upper the Emeishan basalt in the Yunnan-Guizhou border region.As a new type potentisl rare earth deposit,researchers have studied it and got great progress,including metallogenic conditions,occurrence state,enrichment regulation,multipurpose utilization methods and so on.This new type deposit holds giant resource potential,great regional continuity,high concentration,enrich high value rare earth element,such as Pr,Nd,Td,Dy,and economic value and large potential of development and utilization.This paper summarizes the current research progress and key problems of rare earth in rare earth rich clay rock,Xuanwei Formation,and discusses the next research direction.At present,there has not definited on the enrichment mechanism of rare earth elements in rare earth rich clay rock,xuanwei Formation,and further research on metallogenic theory is the key to breakthrough in prospecting. It is urgent to make a breakthrough in the study of occurrence state, which is of great significance for the comprehensive utilization of this new type of rare earth. In terms of comprehensive utilization, economically feasible green beneficiation and smelting technology, comprehensive recovery of associated valuable elements Al, Nb, Zr and Ga, and reclamation and absorption of tailings are the main directions for the next step.