豫西汝阳西灶沟铅锌矿床原生晕地球化学分布规律

Primary Halos Anomaly of Geochemical Regulation Xizaogou Lead-Zinc Deposit in Ruyang,Western Henan Province

西灶沟铅锌矿床区域1∶20万水系沉积物化探综合异常有Au、Ag、Pb、Zn、As、Sb、Mo、W、Mn、Ba等10种元素;1∶5万水系沉积物异常组合元素有Pb、Zn、Ag、Au、As、Mo等6种;1∶1万土壤测量次生晕异常元素组合为Pb、Zn、Ag、Cu、Co、Ni、Mo、Mn、Sn等,归纳来看,Pb、Zn、Ag、Mo四种元素始终都有清楚显示,反映了矿带的成矿元素分布特征;铅锌矿带1∶5 000岩石测量所圈原生晕异常:(1)元素组合与土壤异常总体相近;(2)分带特征明显;(3)异常形态基本规则;(4)钻孔原生晕异常倾角与破碎带和矿体一致;(5)原生晕异常充分反映了成矿元素Pb、Zn、Ag的分布特征;横向分带:Pb、Zn、Ag、Cu连续稳定分布且重叠性好,并与破碎带吻合;轴向分带:矿上Be、Mn;矿中:Pb、Zn、Ag(Cu);矿下:Co、Ni。矿床找矿指示元素主要有:Pb、Zn、Ag、Cu(Mo)。

Xizaogou Lead-Zinc deposit regional 1:200 000 geochemical comprehensive stream-sediment exploration anomaly contains:Au,Ag,Pb,Zn,As,Sb,Mo,W,Mn,Ba and other 10 elements;elements of 1:50 000 stream-sediment anomalies are Pb,Zn,Ag,Au,As,Mo;elements of 1:10 000 soil measuring secondary halo anomaly are Pb,Zn,Ag,Cu,Co,Ni,Mo,Mn and Sn,In conclusion,Pb,Zn,Ag and Mo are always clearly displayed,reflecting the distribution characteristics of metallogenic elements in the ore belt.Primary halos in the 1:50000-rock survey of the lead-zinc belt:(1)element combination is generally similar with soil anomaly;(2)obvious zonal characteristics;(3)abnormal form is basic regulation;(4)borehole original halo abnormal dip Angle is consistent with the broken belt and ore body;(5)primary halos anomaly fully reflects the distribution characteristics of ore-forming elements Pb,Zn and Ag;Horizontal zoning:Pb,Zn,Ag,Cu are continuously and stably distributed,and well overlapped with fracture zone;Axial zoning:Be,Mn are on the upside place;Pb,Zn,Ag(Cu)in the middle;and Co,Ni at the bottom.Prospecting indicator elements mainly are:Pb,Zn,Ag,Cu(Mo).