Geological Characteristics And Genesis Of Lead-zinc Deposits Of The. Chuxiong Trees To Analysis

The Dashudi Pb-Zn mine area, located in the northern section of the Ailaoshan, the less studied. In this paper, based on the collected data available, combined with the field survey work, we systematically analyze the Ore-forming geological background, geological characters of mine and ore deposits and the ore control conditions. on this basis, we summarize the mine deposit mechanism.The Ailaoshan rift formation stage, there were widespread sedimentation, formed the Ailaoshan group,which Contain volcanic material,a thin folder of carbonate, and terrigenous.It is the ore-bearing of the Dashudi Pb-Zn mine area. There Widely distributed layered, similar layered and micro-layered ore bodies, which commonly developed rhythmic structure. In the late construction effects, the ore and surrounding rock have deformation simultaneously.The late Proterozoic, began to experience widespread regional metamorp hism, the area,which composed of the volcanic material and terrigenous,like other strata have experienced a number of metamorphism, so now the Ailaos han Group metamorphic rocks is a superposition of many structural metamorp hism, formed a set of low greenschist facies to Mixed lithofacies metamorphi c rocks combination.the Pb-Zn deposits through submarine exhalative and h ot water sedimentation also experienced a number of times metamorphic recr ystallization, Crumple wrinkly effects and fragmentation effects of reform.The formation of this area is also affected by hydrothermal effects. Firstl y, the earlier formation stratabound deposits of reengineering plays an import ant mineralization. In the hot liquid under the action of various components, r ocks occur recrystallizate and differentiation of common elements such as lea d, zinc, and brought out a volatile components, they are driven by hydrother mal ore, the tectonic migration in the structure of superposition, already lead, zinc mine on the horizon, the main form of quartz vein type, lead zinc depo sits in ore deposit, a layer, near-bedded and pulse shape, lentils and nets pul se shape in various forms. Minerals are often the tectonic belt, brecciated, hu olulingjiao-pengwu and block etc.secondly, there also formed the lens body, or e deposits are often brecciated structure, dyeing and block etc.In brief, The geological evolution has a long and complicated history, and the mineralization process also experienced a long history.the Dashudi Pb-Zn deposit is a complex and multi-factor deposits.