内蒙古霍各乞铜多金属矿床原生晕地球化学特征及深部成矿远景评价

通过系统采集内蒙古霍各乞铜多金属矿区第7、-9勘探线上11个钻孔的岩石、矿石样品,绘制原生晕剖面等值线图,建立垂向元素分带序列,结合该矿床指示元素的变化特征,对钻孔深部隐伏矿进行了预测。该矿床成矿元素组合为Cu-Pb-Zn,前缘晕由Hg、Sb、Cd组成,尾晕以W、As、Sn为特征。该矿床处于倒转向斜的倒转翼,元素的垂向分带序列大部分为反向分带。垂向分带和指示元素的变化特征说明矿床具有多期多阶段反复叠加的特点,第7勘探线至少存在2期含矿流体,钻孔ZK702、ZK830、ZK726、ZK817深部可能有盲矿体。

PRIMARY HALO GEOCHEMICAL CHARACTERISTICS AND DEEP METALLOGENIC PROSPECT EVALUATION OF THE HUOGEQI COPPER-POLYMETALLIC DEPOSIT,INNER MONGOLIA

Based on systematic collection of rock and ore samples in 11 drill holes along No.7 and No.9 exploration lines in the Huogeqi copper-polymetallic ore district of Inner Mongolia,the authors drew contour map of primary halos,established vertical element zoning sequence and,in combination with variation characteristics of the indicator elements,made a prediction of concealed ore bodies in the depth.The ore-forming element association of this ore deposit is Cu,Pb and Zn,the front halo is composed of Hg,Sb and Cd,whereas the rear halo comprises W,As and Sn.As this ore deposit lies on the overturned limb of an inverted syncline,the vertical zoning sequence of elements is mainly of reverse zoning,and the variation characteristics of vertical zoning and indicator elements suggest that the ore deposit is characterized by multi-phase and multi-stage repeated superimposition.There exist at least two phases of ore-bearing fluids along No.2 exploration line,and there might exist blind ore bodies in the depth of ZK702,ZK830,ZK726 and ZK817 drill holes.