Tectonic Rock And Ore Control Rules In The Chaihulanzi Gold Mining Area In Chifeng City Of Inner Mongolia

The Chifeng area in Inner Mongolia is one of the important gold mines in my country,with a large number of gold mines.Compared with other studies of ore deposit science,the previous studies on rock and ore controlling structure of gold deposits in this area are less and lack of depth.In addition,this area is located at the intersection of plate collision and complex tectonic superposition,so it is an ideal place to study the rock and ore controlling structure in gold deposits.The Chaihulanzi Gold Mine and its neighboring areas are the key gold prospecting areas in the Chifeng area of Inner Mongolia in recent years,and the ore body of the Chaihulanzi Gold Mine is obviously controlled by the structure.Therefore,the study on the rock and ore controlling structure of this gold mine can not only enrich the tectonic prospecting theory in this area,but also provide guidance for other deep prospecting in Chifeng area.This article takes the structural characteristics of Chaihulanzi gold deposit as the research object,and on the basis of predecessors,through field profile measurement,downhole observation,sample collection,remote sensing interpretation and indoor research analysis,etc.Study the geological characteristics and structural belt characteristics of typical deposits in the area,focus on restoring the distribution of the ore body in three-dimensional space,and study the laws of structural and rock control in the Chaihulanzi mining area.Mainly get the following recognition:(1)Based on the comprehensive information of remote sensing,geochemical exploration and geological structure,the mining area can be clearly divided into four tectonic belts:NNW,NWW,NNE and NEE.The tectonic zone conforms to the"Star-type"structural characteristics of the New Cathaysian tectonic system,and it is considered that the intersection of the NEE and NWW to the tectonic zone in the mining area is a favorable mineralization area.(2)Combining the geological data and structural characteristics of each middle section,the faults in the ore-forming period can be divided into two groups:NW-NWW direction and NE-NEE direction according to the occurrence,which constitute the basic structural framework of the mining area,which is consistent with the characteristics of regional tectonic lines.But the NW-NWW direction structure with high development degree is the main ore bearing structure.After mineralization,faults mainly fault the ore body and destroy the extension of the ore vein.(3)The distribution law of ore body is studied from the survey line section and the middle plane of fault,grantie vein and ore body.The metallogenic characteristics are that the F₁ fault provides heat source and fluid channel while breaking the ore,and the ore body and the fault are superimposed in the fissure near the intersection,so it is speculated that there may be an enrichment zone of gold deposits along the deep SW of the F₁ fault.