滇西北香格里拉翁水地区水系沉积物地球化学特征及找矿预测  

Geochemical Characteristics of Stream Sediments and Prospecting Implications in Shangri-La Wengshui Area,NW Yunnan

作　　者：黄永高[1,2,3] 熊昌利 罗改[3] 张彤[3] 贾小川[3] 杨学俊[3] 叶春林[3] 王燚[3] HUANG Yonggao;XIONG Changli;LUO Gai;ZHANG Tong;JIA Xiaochuan;YANG Xuejun;YE Chunlin;WANG Yi(School of Earth Science,Guilin University of Technology,Guilin,Guangxi541004,China;Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Guilin,Guangxi541004,China;Evaluation and Utilization of Strategic Rare Metals and Rare Earth Resource Key Laboratory of Sichuan Province,Sichuan Geological Survey,Chengdu,Sichuan610081,China)

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]广西有色金属隐伏矿床勘查及材料开发协同创新中心,广西桂林541004 [3]四川省地质调查院稀有稀土战略资源评价与利用四川省重点实验室,四川成都610081

出　　处：《现代地质》2020年第5期897-907,共11页Geoscience

基　　金：中国地质调查局项目(DD20160016)。

摘　　要：翁水地区位于滇西北义敦岛弧南段,属于香格里拉弧斑岩型Cu-Mo-W成矿带,区内已发现大型休瓦促Mo-W矿床及多处金属矿床(点),具寻找Mo、W、Pb和Zn等多金属矿前景。1∶50000水系沉积物地球化学测量成果显示,翁水地区Cu、W、Pb、Zn、Sn、As、Sb、Bi、Co和Ni等元素丰度显著高于西南三江成矿带水系沉积物背景值;元素异常明显受控于构造和岩性,Au元素主要富集在喇嘛亚组三段(T3lm^3);W、Mo和Bi元素主要富集在二长花岗岩;Pb,Zn元素主要富集在图姆沟组二段(T3t^2)。综合研究区元素异常特征、成矿地质条件及异常查证结果,圈定29处地球化学综合异常,优选2处找矿预测区,即休瓦促Mo-W A级找矿预测区和磨莫亚Pb-Zn-AgB级找矿预测区,为进一步找矿工作提供了勘查方向和重要参考。The Wengshui area is located in the southern Yidun Arc(NW Yunnan)and belongs to the Shangri-La arc-type porphyry Cu-Mo-W metallogenic belt.This area has good prospecting potential for polymetallic deposits such as Mo,W,Pb and Zn,where the large Xiuwacu Mo-W deposit and many other ore deposits/occurrences have been discovered.The 1∶50,000 stream sediment survey shows that the contents of Cu,W,Pb,Zn,Sn,As,Sb,Bi,Co and Ni at Wengshui are significantly higher than those in the average Sanjiang metallogenic belt,SW China.The element anomalies are clearly controlled by structure and lithology.Gold is mainly enriched in T3lm^3;W,Mo and Bi are enriched in monzonitic granite pluton;and Pb,Zn are enriched in T3t^2.According to the spatial distributions of element anomalies and metallogenic conditions,we have delineated 29 integrated geochemical anomalies,and two prospecting targets including the Xiuwacu Mo-W Grade-A target and the Momoya Pb-Zn-Ag Grade-B target.This provides direction and important reference for further prospecting work.

关 键 词：水系沉积物 地球化学 找矿预测 翁水 义敦岛弧 

分 类 号：P595[天文地球—地球化学] P618.2[天文地球—地质学]