河南省卢氏县班子沟锑矿床地质特征及找矿前景探讨

The Geological Features and the Ore Prospects of Banzigou Antimony Deposits in Lushi County Henan Province

班子沟锑矿床地处华北地台和扬子地台两大构造单元的过渡地带,北秦岭褶皱带东段,区域构造线呈NNW—SEE.其赋矿围岩为古元古界秦岭群(Pt1Q)雁岭沟组(Pt1y):主要岩性为白云大理岩、黑云斜长片岩、斜长角闪片岩、云母石英片岩等;本区秦岭群地层属Sb高背景区,微量元素分析结果表明,岩石中Sb、Pb、As等金属元素富集,为矿源层(矿源岩).区域上在双槐树—五里川一带Sb、Pb、As为高丰度值密集异常富集区,该区已查明锑矿床十余处.班子沟矿区位于锑异常富集区中部,目前所探明的矿石类型主要为角砾状矿石、浸染状矿石、脉状—网脉状矿石,通过进一步勘查可望发现大型块状等类型矿床,找矿前景广阔.

The Banzigou antimony deposit is located in the two tectonic units’stransition zone of the North China platform and the Yangzi platform,in the east of North Qinling fold belt,tectonic line presents NNW-SEE. The ore rock is Guyuan ancient Qinlingqun（Pt1Q）Yanlinggou group（Pt1y）：the main lithology of dolomitic marble,dark clouds flash schist and plagioclase schist,long oblique angle of mica quartz schist,etc.;The Qinlingqun strata in this area belongs to Sb high background,microelement analysis results indicate that the rocks in the enrichment of metallic elements such As,Sb,Pb,As,which is for the source bed（source rock）. In the area of Shuanghuaishu-Wulichuan, Sb,Pb,As is rich as intensive high abundance ratios value anomaly,and the area has identified the antimony deposit more than 10 places. The antimony deposit of Banzigou is located in the middle of antimony anomalies enrichment region. As far as now,the ore types verified are mainly breccia,disseminated ore,ore vein-net vein ore. Through further exploration,the area is expected to find large block rich ore and other types of ore,and has a vast ore prospecting.