CAJ | 학술논문

西藏班戈日阿铜多金属矿床位于班戈-腾冲多金属成矿带,是近年来新发现的矽卡岩型铜多金属矿床,已探明资源量达中型规模。最新研究和找矿成果显示矿带呈北西向展布,受燕山晚期白垩纪花岗岩类岩体侵入作用控制,矿体分布于岩体与下白垩统灰岩地层接触带及附近部位。在空间上,矿床主要分为三个矿段：主矿体分布在矿区中西部,目前在西矿段已圈定5个（条）铜矿体,矿体呈似层状、透镜状,其中最大的Cu13号矿体长221 m,平均厚9 m,沿倾向已控制延深100 m以上,铜品位：0.45%~2.01%,平均0.9%。主要金属矿物为黄铜矿、磁铁矿。中矿段已经圈定3条矿体,成矿元素除铜外,铅、锌、银含量也较高,为铜多金属矿体。矿体呈似层状、透镜状。其中以Cu-23号矿体最大,长达300 m,矿体最宽处达110 m。矿体平均品位Cu1.48%,Pb 1.25%,Zn 2.52%,A g 32.52×1-0 6。本文在矿区地质特征研究的基础上,通过对1：5万水系沉积物测量成果分析,对比中、西矿段成矿条件,对矿区东段进行了预测评价,指出该矿区具有较好的铜多金属找矿前景。同时建议对已圈定的1：5万水系沉积物异常开展1：1万土壤地球化学测量工作,进而圈定该区铜多金属矿带或矿（化）体,为矿区深入勘查工作提供依据。
서장반과일아동다금속광상위우반과-등충다금속성광대,시근년래신발현적석잡암형동다금속광상,이탐명자원량체중형규모。최신연구화조광성과현시광대정북서향전포,수연산만기백성기화강암류암체침입작용공제,광체분포우암체여하백성통회암지층접촉대급부근부위。재공간상,광상주요분위삼개광단：주광체분포재광구중서부,목전재서광단이권정5개（조）동광체,광체정사층상、투경상,기중최대적Cu13호광체장221 m,평균후9 m,연경향이공제연심100 m이상,동품위：0.45%~2.01%,평균0.9%。주요금속광물위황동광、자철광。중광단이경권정3조광체,성광원소제동외,연、자、은함량야교고,위동다금속광체。광체정사층상、투경상。기중이Cu-23호광체최대,장체300 m,광체최관처체110 m。광체평균품위Cu1.48%,Pb 1.25%,Zn 2.52%,A g 32.52×1-0 6。본문재광구지질특정연구적기출상,통과대1：5만수계침적물측량성과분석,대비중、서광단성광조건,대광구동단진행료예측평개,지출해광구구유교호적동다금속조광전경。동시건의대이권정적1：5만수계침적물이상개전1：1만토양지구화학측량공작,진이권정해구동다금속광대혹광（화）체,위광구심입감사공작제공의거。
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.