The Geological Characteristics Of Deposit And Genesis Of Wangershan Fault

Jiaodong Peninsula is China's largest gold mineralization province.The vast majority of gold deposits developed in the Sanshandao?Zhaoyuan-pingdu and Jiaojia fault zone.But there are few studies on the secondary faults.For the secondary faults of the Jiajia fault-the Houjia fault,the Dongzhuangzi fault and the Wanger mountain fault,the Wanger mountain fault is the main ore controlling and ore deposit structure.In this paper,based on the previous studies,this paper takes the Shangzhuang and Hedong gold mines in the middle of the Wangershan fault,for studies of the geological characteristics: ore body characteristics,mineral characteristics and ore characteristics,as well as structural ore controlling characteristics,S isotope,Inclusions,rare earth elements and metallogenic epochs,and summarizing the characteristics of ore deposits and ore-controlling characteristics of Wangshan fault.the some conclusions are drawn as follows:1?The ore body's occurrence are strictly controlled by the NE-NNE trending fault.The ore body is located in both strongly-altered the hanging wall and footwall of the fault zone,and the ore bodies mainly output as veins;Most of the deposits near the main fracture surface are parallel to the fracture surface output and most of the orebodies are located in the main fault hangingwall.The occurrence of faults is sharply changed and is easy to mineralize,The ore body has the characteristics of equidistant distribution.2,The research of the fluid inclusions in quartz reveal that the homogeneous temperature in the middle of the Wangershan fault ranges from 210~330?.The salinity ranges from 34.06~12.86%.The capture pressure of fluid inclusions from 43.51 to 76.48 MPa.The ore-forming depths ranges from 5.28~7.26 km,so it is a low salt and middle temperature and middle-deep hydrothermal ore deposit.It has huge potential in deep prospecting.3,Sulfur isotope and hydrogen oxygen isotope study show that the formation of ore deposits in the fault zone are hydrothermal mixtures of crust and mantle magma,in the metallogenic evolution,mantle materials involved in the formation of ore deposits.Ore-forming fluid source of this deposit is magmatic water in early stage,and precipitation is Entering at the Mid-mineralization.The metallogenic age is most close to Guojialing granite,The veins in the mining area are coexisting with the deposits or cutting deposits,vein rock can be a prospecting criteria...