班公湖-怒江Cu- Au- Fe- Li多金属成矿带主要地质成矿特征及潜力分析

随着地质大调查的开展和班公湖-怒江地区新的找矿进展和预测成果不断涌现,班公湖-怒江作为我国找矿的重点成矿区带之一,故对其开展系统的成矿区划和部署研究工作具有重要意义。本文以最新的研究成果和找矿突破为基础,通过综合分析,在该地区划分新的重要成矿部署区带,厘定边界并将其命名为"班公湖-怒江Cu-Au-Fe-Li多金属成矿带"。结合区域成矿地质背景的综合研究,在区内划分了3个Ⅲ级成矿带,初步建立了班公湖-怒江Cu-Au-Fe-Li多金属成矿带成矿谱系,其成矿作用具有多期次发育的特点,其中喜山期与燕山期是该矿带的主要成矿期。研究区主要成矿类型为斑岩型铜金矿、矽卡岩型铜金矿、变质碎屑岩中脉型岩金矿、矽卡岩型铁矿、现代盐湖型钾盐、硼矿、锂矿等。结合区域找矿进展和潜力评价最新成果,认为本区Cu、Au、Fe、Li、K、B找矿潜力巨大,为下一步勘查部署的主攻矿种,同时在本区划分了3个远景区,其中2个为重点远景区,1个为一般远景区,对研究区下一步矿产勘查部署工作有一定指导意义。

Geological Characteristics and Resource Potential Analysis of the Bangong Nujiang Cu- Au- Fe- Li Metallogenic Belt

With the implementation of geological survey and continuous emergence of prospecting and assessment results, Bangong- Nujiang, as one of the most important areas for key to exploration target, is of big importance to conduct systematic metallogenic study and research deployment. Based on the latest prospecting progress and assessment results, this study defined the boundaries of the re- divided metallogenic belt and named it the Bangong- Nujiang Cu- Au- Fe- Li Metallogenic belt. Comprehensive study of the regional geological background divided the working area into three metallogenic zones. The metallogenic system of the Bangong Nujiang polymetallic mineralization belt was established. The study shows that the system is characterized with multiple mineralization stages, with Himalayanian and Yanshanian being the major metallogenic time.The mineralization types in this area include porphyry- type Cu- Au ore deposits, skarn type Cu- Au ore deposits, vein type Au deposits within metamorphic clastic rocks, skarn- type iron ore deposit, modern salt lake type potassium, boron, lithium ore deposits and others. Combined with the latest prospecting and assessment results for this area, this paper suggests that this area is of big potential for Cu, Au, Fe, Li, K and B, which will be working direction for next major mineral species. 13 prospective areas were defined, including two key prospective areas and one average area. This will be of some guiding significance for next mineral exploration and working deployment.