胶东玲珑金矿田深部钻孔揭露招平断裂带及其意义

玲珑金矿田位于胶东隆起区,著名的招(远)—平(度)金成矿带的北端。文章以野外调查和已有资料为基础,重点剖析研究区深部钻孔资料,对比研究招平断裂带北段地质特征、蚀变带特征、控矿构造特征,取得了一定的新认识。最新研究成果表明:九曲蒋家断裂带和破头青断裂带属同期构造、同一性质成矿流体、壳幔混合的中低温热液矿床,均为招平断裂带北段的分支控矿断裂带;通过对比含矿碎裂岩带宽度和探获金资源量,证实九曲蒋家断裂带规模及含矿性均强于破头青断裂带,九曲蒋家断裂带为招平断裂带北段最主要控矿断裂。九曲蒋家断裂带深部是今后重点找矿方向,本文按地质可靠程度圈定了5处预测区,共预测Au金属量约1200t。

The deep borehole of Linglong gold ore field in Jiaodong reveals Zhaoping fracture zone and its significance

Linglong gold orefield is located in Jiaodong upwelling area, north of the famous zhao (yuan)-ping(du)gold mineralization belt. Based on field investigation and existing data, this paper has obtained a certain new understanding bymainly analyzing the deep borehole data and comparing the geological characteristics, alteration zone characteristics and ore-controlling structure characteristics of northern Zhaopingfracture. The latest research results show thatJiuqujiangjia fault and Potouqing fault belong to the branch ore-controlling fracture zones in northern Zhaopingfracture,which arethe mesothermal and epithermal deposits with syn-tectonic movement,the same ore-forming fluid and crust-mantle mixture. By comparing the width of ore-bearing cataclasticrocks and the amount of gold resources,it is turned out that Jiuqujiangjia fault,which the scale and ore-bearing property of Jiuqujiangjia fault is stronger than that of Potouqing fault, is the most important ore-controlled fracture in northern Zhaopingfracture. The paper concludes that the deep part of Jiuqujiangjia fault will be the key prospecting direction in the future, where five prediction areas have been delineated according to the geological reliabilityand the gold metal quantity is predicted to be about 1200t.