资源调查与环境2011，Vol.32Issue(4)：299-306,8.
西藏班戈日阿铜多金属矿床地质特征及找矿前景
Geological characteristics and prospecting potential of Ri＇a copper polymetallic deposit in Bange area,Tibet
摘要
Abstract
The Ri＇a copper polymetallic deposit,which is located in Bange-Tengchong polymetallic mineralization belt,is a medium-sized copper deposit of skarn type discovered in recent years.The newest researches and prospecting achievements of this deposit show that the mineralized zone mainly spreads with an N-W trending and is controlled by intrusion of the Late Yanshanian Cretaceous granitoid pluton; the ore-bodies are mainly occurred in the contact zones between granitoid pluton and lower Cretaceous limestone and their adjacent positions.Spatially,the deposit can be divided into three ore blocks;the main ore body of the western ore block locates in the mid-west part of the deposit,where five copper ore-bodies have been delineated,mainly showing stratiform-like and lenticular shapes.The No.13 copper ore-body is the biggest one with length of 221 m,average thickness of 9 m and controlled depth of over 100 m in dip direction.The copper grade has a range of 0.45-2.01% with average of 0.9%,and the main metallic minerals are chalcopyrite and magnetite.In the middle ore block,where three ore-bodies have been delineated.The ore-forming element is mainly Cu,but the contents of Pb,Zn,and Ag are also relatively high,showing a copper polymetallic mineralization.The ore bodies are occurred in the form of stratiform-like and lenticular shapes,and the No.23 copper ore body is the biggest one with length of 300 m and maximum thickness about 110 m.The average grades of ore-body are as follows： Cu：1.48%,Pb：1.25%,Zn：2.52% and Ag：32.52×10-6.Based on the researches of geological characteristics of the deposit and the analysis of achievements of 1∶50000 scale stream sediment survey,as well as the correlation of the metallogenic conditions of the middle and western ore blocks,the prospecting potential in the eastern ore block of the deposit is evaluated and predicted in this paper.It is pointed out that the eastern ore block of the deposit has a better prospecting potential of copper polymetallic ore bodies.At the same time,it is suggested that 1∶10,000 soil geochemical survey works should be carried out in the area of anomalies delineated by 1∶50000 scale stream sediment survey to further delineate copper polymetallic ore belt or ore bodies for providing fundamental basis for further exploration works.关键词
铜矿床/地质特征/找矿前景/班戈日阿/西藏Key words
copper deposit/geological characteristics/prospecting potential/Ri＇a/Bange/Tibet分类
天文与地球科学引用本文复制引用
武彬,高顺宝,杨成,刘君安,王明志..西藏班戈日阿铜多金属矿床地质特征及找矿前景[J].资源调查与环境,2011,32(4):299-306,8.基金项目
中国地质调查局项目（项目编号：1212010818038）资助 （）
