沂沭断裂带构造活动与胶东金矿形成关系之探讨

Study on the Relationship between Tectonic Activity in Yishu Fault Zone and the Formation of Gold Deposits in Jiaodong Area

在对沂沭断裂带基本特征、形成演化与动力学特征进行论述的基础上,将与沂沭断裂带相匹配的一系列次级断裂构造统一划分为沂沭断裂带的羽状断裂系统。研究表明沂沭断裂带经历了大规模的左行平移、伸展、拉张及挤压作用,形成了以堑垒构造、盆岭构造、羽状构造系统及大陆边缘花岗岩系为特征的完整构造体系,与之同时伴生形成的胶东地区次级羽状构造系统,既是沂沭断裂带的次级断裂构造,又自成体系,是胶东地区的控矿容矿构造,它们的形成演化受沂沭断裂带的运动学特征和力学特征制约,整体上服从于沂沭断裂带的运动学机制,但又有各自的演化特征和力学特点,是胶东地区金矿形成的赋存场所。

Based on analyzing basic characteristics ol Yishu lault belt,lormation,evolution and dynamic characteristics,a series ol secondary faults which matched with Yishu fault belt have been classilied into pinnate fault system.It is showed that Yishu lault zone has experienced large scale sinistral strike slip movement,extention,pull apart and compression,and lormed a complete structural system with graben and horst,basin and range tectonics,pinnatetectonic system and continental margin granites,associated with the lormation ol second order tectonic system.It is not only the secondary lault structure ol Yishu lault zone,but also an ore controlling structure.Its lormation and evolution are restricted by the kinematics and mechanics ol Yishu lault.The whole movements not only obey the kinematics ol Yishu lault zone,but also have their own evolution and mechanical characteristics.It is the occurrence place ol gold deposit in Jiaodong area.An important contribution ol Yishu lault zone to Jiaodong gold deposit is that it not only provides the material source ol mantle,but also plays an important role in gold mineralization in Jiaodong area.The scale ol gold deposit becomes larger and larger when it is close to Yishu lault belt.It rellects that there is a inner relation ol the size between Yishu lault zone and the distance.It also rellects the intrinsic link distance the size and distance ol gold yishulault.With the strong activity ol Yishu Fault not only lormed with matching leather ore control system,to provide a space lor the gold location,but also because ol the Yishu Fault Zone and the metallogenic material cut through mantle mantle in the Jiaodong gold mineralization,the closer the Yishu Fault Zone ol the deposit scale is larger,their common ore lluid supply channel and the occurrence site,this is a key lactor in the lormation ol large superlarge gold deposit lormation.