Structural Regularity Of Ore-controlling And Mineralization Prediction Of Jinchiling Gold Deposit,in Jiaodong Peninsula

Jinchiling gold deposit is a typical quartz vein type gold deposit located in north of zhaoyuan in Jiaodong peninsula.The ore body is controlled by NE –trending Caotougou fault.The article utilize the basic theories and methods of mine field structure with detailed outdoor geological survey and indoor summarizes research.Based on the previous researches,we identified the characteristics of ore-controlling faults' geometry,kinematics and dynamics.Finally,we summarized the regularity of structural ore-controlling and make the prediction.The main findings are as follows:(1)By studying the trace elements and REE,it is found that Au has a positive correlation with Ag,Cu,Pb and Zn,which indicates that the gold mineralization stage is polymetallic sulfide stage.Magmatic rocks,alteration,and dike rock both show enrichment of LREE,HREE depleted right REE model,ore and dikes have a similar source of diagenetic phase.(2)The NE trending fault in the mine area both for leading and constructing the ore,and the near SN-trending fault is for constructing the ore.The tectonic stress field is NW-SE extrusion—NE-SW extrusion—NW-SE extrusion in Jinchiling gold deposit.Caotougou and lingshan-beijie faults are conjugated like diamond-shaped in the deep,representing low temperature and low differential stress formation set.(3)Transpressional tectonic typically produce pyrite phyllic(fragmentation)? phyllic ? potassic granite,which ore is mainly pyrite-sericite type;while transtension tectonic typically produce pyrite quartz vein ? potassic granite,which ore is mainly pyrite quartz vein type.(4)Jinchiling gold deposit has the following structural ore controlling rules:(1)multi-level structure ore control,ore field structures are "N" shaped and ore-body structures are “?”shaped;(2)The footwall of vein P4 fault and diorite veins footwall are favorable mineralization position in the deep;(3)ore was nearly equally spaced;(4)The pitch and plunge rules of P4 veins,SW-trending plunge,under 240 meters the plunge angle becomes bigger.Pitch turns from SW trend to NW trend under 240 meters;(5)ore-controlling of the structural surface,ore body is rich when the ore strike turns small and the dip angle turns big;P4 fault has an arcuate fracture surface.The NW-trend protrusion of the P4 fault contain rich ore.The establishment of a waveform function of the P4 veins in plan and section,with deep forecasting.