Analysis Of Structural Ore-controlling Laws In Anqi Fault Zone,Xinjiang

The northeast section of Anqi fault zone and the Hattu gold ore area controlled by the Hattu fault zone are important gold mineralization areas in China,but for the whole Anqi fault zone,the favorable geological conditions for metallogenesis are not consistent with the amount of gold resources identified.Therefore,this paper divides the whole Anqi fault zone into three parts,and selects the typical research area on these three parts: the periphery of Hattu,the land of Caine and the Vana,through detailed field geological survey,using the method of structural analysis and the theory of geochemical exploration.Taking the study of surface tectonics as the main line and the induction of ore-forming law as the goal,the authors carried out the study on the structural properties and geochemical anomalies of ore-controlling faults in order to contribute to the conclusion of the rules of tectonic ore-controlling in Anqi area.The macro analysis and data mapping analysis of ore-controlling structure in the study area show that the ore-controlling structure of Anqi fault zone has undergone five stages of deformation: the first stage of deformation is continuous progressive deformation in the region;The second deformation is ductile shear deformation at the middle and deep tectonic level;the third deformation is brittle and ductile deformation;the fourth deformation is knee flexural deformation;the fifth deformation is caused by late fracture.At the same time,the geochemistry profile corresponding to the measured structural profile is measured.By analyzing the data obtained from the test,the multi-element anomaly curve is made.It is found that the anomalous scale of the elements is basically the same as the spatial position of the tectonic zone.It can accurately reflect the alteration position of the structure.It is considered that the geochemical exploration method is effective and can provide evidence and restriction for the summary of tectonic ore-controlling law.Through the comprehensive analysis of the geological background of the ore area and the extraction of geochemical anomalies,combined with the field geological observation and structural analysis,the metallogenic regularity of the study area isdetermined: the type of the ore deposit in the study area is medium-temperature magmatic hydrothermal type gold deposit;The metallogenic structure is the complex tectonic system of regional large faults and its secondary faults,and the metallogenic stage can be divided from early to late into three stages: the early stage,the main stage and the late stage,in which the early stage is related to the second stage of tectonic deformation.The main stage is related to the third tectonic deformation,the late stage is related to the fourth tectonic deformation,and the Anqi fault zone plays a controlling role in rock,ore control,ore-conducting and ore storage.