Henan Luoning Fan Zhuang Gold And Silver Multi-geological Characteristics And Metallogenic Prediction Research

The area of Xiongershan is an important ore-forming region of nonferrous metals and precious metals in East-Qinling orogenic belt.It is of important theoretical and practical meanings to analyzing the ore-formin regularity rule of gold and silver poly-metals in Xiongershan area.This thesis uses the theories of oregeology,petrology,structural geology and geochemistry as well as petrochemistry and remote sensing,to study geological characteristics and genesis of gold and silver polymetallic deposit in LuolingFanzhang, Xiongershan Region,revealing the time-space distributing rule and space exhibiting feature.Applying the characteristics of the chemical component of diorite,which are abundant in iron,magnesium,but insufficient of aluminum and calcium,the conclusion has been induced that the component of basement in this mineral district is abundant of iron and magnesium.The geological investigation in the area of west slope of Quanbaoshan and Tiancun,indicated the existence of pillow structure of spilitic-keratophyre related to the volcanic eruption in submarine suggesting that the origin of iron ore matter in Baijiazhuang and Suoao is related to the submarine volcanic exhalation and spouting. Meanwhile,it is induced that the enrichment of iron ore matter is shown to be the superposition of later hydrothermal fluid and the furthering deformation and metamorphism.Base on this research,a further understanding about the extensional tectonics has been obtained and the rule of ore-forming distribution was explored.The ore-forming style in the region can be divided into 3 forms:1.Near the North Taihua Formation and Xionger Formation,the gently dipping gold ore vein has been formed in the footwall of Decoupling fault,where occur intensive silication and potassium feldspathization belt2.In the middle region,the mineralization is dominated by silver,and the dip of the silver ore vein is steep.3.The genesis of ironic mineralization can be devided into 2 styles.Firstly, metamorphic and differential iron mineralization which is relative to the ultramafic rock and amphibolite mass under the Shibangou Group,mainly distributes to the region of Zoumaping,Zhuyuangou and Tonghuajia.Secondly,the massive sulfide deposit which is relative to the submarine volcanic exhalation and spouting mainly distributing in the region of Suoao and Baijiazhuang.