Gold Metallogenic Geological Features And Structure Ore-controlling Research Of Jiaodong

Jiaodong region is located in the eastern part of the North China Craton, the tectonic inTanlu fault zone east, south of the Pacific Plate, Eurasian Plate and the Pacific Plateintersection here. The Jiaodong region strata mainly by Jiaodong Group, Jingshan Group,powder sub Hills, Penglai group metamorphic. Strong magmatic activity within the region,magmatic rocks are widely distributed, Linglong granite outcropping, Guojialing granite,Kunlun Mountains granite, etc. The magma activities are focused on the MesozoicYanshanian, cenozoic magmatic activity is weak, magmatic rocks less, mainly effusive orhypabyssal intrusive main. Constructed to fracture, regional NE trending faults are widelydistributed, important guide rock ore-structure, control the formation and distribution ofmagmatic rocks.The Jiaodong area is an important gold producing area, a quarter of the country’stotal gold reserves. The Jiaodong region gold mineralization time concentrated in theMesozoic Yanshanian (100—120Ma) and veins larger depth, the obvious tectonic control.The Jiaodong area gold types, but most of them can be summarized as altered rock type orquartz vein type gold. Altered rock type gold field of Jiaojia with exquisite quartz vein typegold field are world famous typical deposit．In this article, the mantle branch theory and the theory of plate motion theory,analysis of the of Jiaodong regional tectonic framework of the formation and evolution.Think the Izanagi plate Early Cretaceous East Asian continent’s high-speed, low-anglesubduction caused large-scale sinistral motion of the Tan-Lu fault zone, the sinistral Tan Lufault zone control Jiaodong region NE left line pressure-shear fracture structure formation.Since then northward drift of the Pacific Plate, east Asian continent by the subduction ofthe Pacific Plate forward, Jiaodong lithosphere altar, regional stress field by the earlycompression into the role of tension, pressure-shear fracture structure from the left line intotensional.Plate motion Jiaodong region uplift of the plateau landscape, but the actuallandform coupled geomorphological for a pot mountainous basin and range. Mantle branch theory is that. Jiaodong area under a Jiaolai basin-centered mantle Asian hot column, TheAsian hot column upward emplacement cause lithosphere erosion by hot melt, to formationof Jiaolai Basin.The lithosphere mantle material at the top of the crown by blocking, thenalong the middle crust, low-speed high-conductivity layer outward detachment rheological.Caused massive intrusion of mantle material-mafic magma activities, so that the theperipheral orogenic belt rapid uplift of the formation of the mantle branch. Made ofminerals migrate to the orogenic belt axis, by the continuing activities of the ductile shearzone cutting, they migrate up along the shear zone and enriched mantle branch favorablestructural expansion with precipitation mineralizationto form Jiaodong widely distributedin quartz vein and altered rock type gold deposit.