The Geological Characteristics And Analysis Of Ore Controlling Factors Of Huofengya Gold Deposits In Ningqiang County,Shanxi Province

Huofengya gold deposit is located in the Mianluening region,it's the famous "Golden Triangle" in Shaanxi,the region is rich in mineral resources,many middle large gold polymetallic deposits have been found in the eastern region,especially the discovery of gold,reflecting the good prospecting for gold.Based on the ore deposit as the foundation,makes a comprehensive analysis of previous data based on detailed field geological investigation and a large number of mining area,the study of previous work,data collection means of field geological survey,indoor analysis,based on the Regional geological background,mining strata characteristics,orebody characteristics research,control the factors on gold deposit in Huofengya area were analyzed.The conclusions are obtained as follows:Based on a large number of geological surveys and regional gold deposits,it is considered that the genetic types of the gold deposits in this area belong to the marine volcanic sedimentary late tectonic hydrothermal type gold deposits.A large number of exploration results show that the ore body is mainly influenced by strata,lithology and ductile shear structure,a number of small scale,is a vein,section,diagonal parallel output.The ore body is controlled by the structural fracture in the later stage,gold ore body and the formation of the formation was 20°-50° oblique,and the dip angle of the orebody is steep.Through a large number of geological characteristics of the ore body,the ore bodies are mainly quartz vein type gold ore and fine jade rock type gold ore,mainly quartz vein type.The strata controlled the output of the orebodies.The Pt2-3Bk22-2b formation is a middle basic volcanic rock.The gold element in this layer is very obvious and the content of gold is high.It is an important source bed and gold bearing parent rock in the area.The characteristics of gold ore bodies are also controlled by lithology,all of which are fine and thin.On the basis of the regional metallogenic background,regional tectonic evolution history and the structural features of the mining area,it is considered that the structural shear zone is a good channel for ore hosting and ore hosting.Deformation wrinkle Jinning period,forming a good ore fluid channel,which laid the foundation for the later mineralization;occurrence of compressional event strong Chengjiang period,the formation of the ore fluid channel good;invasion of basic to acidic rock,a large number of dikes,provides good conditions for the dynamic thermal activation and migration of ore-forming material.Deep mylonitization made with Au components and other ore-forming elements are formed with hydrothermal activation differentiation;different parts of the near surface corresponding to the formation of altered mylonite type and tectonic altered rock type and quartz vein type gold deposit,resulting in different types of gold mineralization superposition.Magmatic activity provided the source of ore-forming materials and contributed to the enrichment and mineralization of late elements.During the cracking period of the paleo continent,the intrusion of middle and basic rock bodies laid the metallogenic material foundation for the formation of endogenic metallic deposits in this area.The thermal energy brought by magma intrusion can warm up the solution in the surrounding rocks of the rock mass and make the ore-forming materials active,forming or taking part in the formation of metallogenic solution,and then migration and enrichment mineralization.Based on the prospecting marks in the mining area,it is considered that the gold bodies are closely related to quartz veins,especially a group of quartz veins in the northeast to the East,which is closely related to mineralization.The alteration of surrounding rock is closely related to gold mineralization,but the relationship between pyrite mineralization and gold mineralization is more closely related.The content of pyrite directly determines the change of gold ore grade,and it is a sign of finding gold mine weight.Mylonite is an indirect marker for finding gold bearing altered Jasper rocks.Physicochemical zone and secondary tectonic area and see quartz vein oblique formation,occurrence changes are favorable sites for gold enrichment area.