西藏改则布孜村地区地球化学异常特征及成矿远景分析  

Geochemical Anomaly and Metallogenic Prospect Analysis of Buzicun Area in Gerze County,Tibet

作　　者：胡西冲[1] 夏斌[1] 黄强太[1] 夏连泽[2] 夏中宇[1] 郑浩[2] 石晓龙[1] 王志龙[2] 

机构地区：[1]中山大学海洋学院∥海洋石油勘探开发广东省普通高校重点实验室∥广东省海洋资源与近岸工程重点实验室,广东广州510006 [2]中山大学地球科学与地质工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2015年第6期137-143,共7页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金项目资助项目(41372208);中国地质调查局青藏高原专项基金资助项目(1212011221088);矿床地球化学国家重点实验室开放研究基金项目(201304)

摘　　要：班公湖-怒江成矿带是西藏境内一条重要的成矿带。在1∶5万水系沉积物测量的基础上,对西藏班公湖-怒江成矿带上改则县布孜村北部龙巴抗东-扛贾异常区的地球化学异常进行分析,详细讨论了成矿元素在地表水平上的分布特征、单元素异常特征、异常元素组合特征。布孜村地区表现为多种金属元素组合异常,成矿元素(Au、Cu)异常强度高,前缘元素(As、Sb、Ag、Cd、Pb)异常,尾部元素(Bi、W、Mo)异常发育较好。自西向东分别为前缘元素、成矿元素、尾部元素的异常区,各矿化晕分带性明显,推测研究区可能存在斑岩型铜金多金属矿床。龙巴抗东-扛贾异常区是寻找大型铜金多金属矿床的良好远景区。The Bangong Co-Nujiang metallogenic belt is one of the most important metallogenic belts in Tibet. Its geochemical characteristics of Longbakangdong-Kangjia section at Buzicun village are analyzed based on the result of 1∶ 50 000 stream sediment survey,including distribution and anomaly characteristics of ore-forming elements on the surface,and the characteristics of anomaly element combination. The results show that metal anomaly occur in combination of multiple metal elements,and the highest anomaly is Au-Cu combination,the second is front elements combination of As-Sb-Ag-Cd-Pb,then rear elementcombination of Bi-W-Mo. The anomaly areas of front elements,ore-forming elements,and rear elements are distributed from west to east,and the halos have good zonation,suggesting that there may be a porphyritic type Cu-Au deposit in study area,and Longbakangdong-Kangjia anomaly area may be a potential area for prospecting large copper-gold deposit.

关 键 词：西藏 班公湖-怒江成矿带 地球化学异常 成矿远景 

分 类 号：P618.41[天文地球—矿床学]