Ore-Controlling Rules And Prospecting Indicator Of Silurian System Gold Field Structure In North Hnayin, South Qinlin

Based on "Special Study on Liufang Silurian System Gold Field Structure ofTiefo-Hanbin Zone in Hanyin County, Ankang City, Shaanxi Province and RapidProspecting and Evaluation Method", the paper has got access to the gold field structuralcharacteristics by making use of views on structural geology in ore field, and studied theore-controlling rules of the gold field. Main work is as followings:1) The ore field structure of the working zone experiences three main periodsdeformation and three-period deformation of late superposition. The first period is extensionsliding structure deformation of late caledonian period-haixi period. The second period isthrust nappe compresive deformation of early Indo period. The third period is thrustnappe-right translation system deformation of late Indo period. The forth period is downperiod deformation of after orogenic period of early Yanshanian. The fifth is NW-SEtrending extensional system deformation of late Yanshan. The sixth period is NE-SWextrusion and thrusting deformation of the Himalayas.2) According to schistose, mylonite strength and other deformation characteristics, themain ore-controlling structures in the ore field are divided into five ductile shear zones fromnorth to south in sequence on basis of the uniform formation mechanism and deformationcharacteristics,: DSZ1~DSZ5, so as to circle the target area and look for gold deposits indifferent shear zones relying on the same known ore-controlling rule.3) The distribution law of The quartz veins and lenses in Changgou gold deposit zonehas been statistically analyzed, which is consistent with the distribution of ore bodies, andboth of which have close relations.4) Taking ductile shear zone DSZ3of Changgou mine area as the key point for study,and from the exposure and microscopic scaleccording to indicative minerals of hydrothermalmetamorphism, the hydrothermal metamorphism in the shear zone is preliminarily dividedinto three periods: early Indo-China M1hydrothermal metamorphism, late Indo-China M2hydrothermal metamorphism and hydrothermal metamorphism after magma period ofYanshan Period M3.5) The author sufficiently collects the previous data and comprehensively makes use ofdifferent geological research methods to study the metallogenic characteristics in the area, such as the way to explore the geochemical original halo to interpret the close relationbetween the distribution of gold body and characteristics of mine area structure, the way tomeasure temperature with fluid inclusion to explain the mineralization temperature beinglow-medium temperature conditions. The author makes analysis on the ore-controlling rulesof structure in the area from the perspective of structure, and the area belongs to theinterface-strain ore-controlling mechanism on basis of the previous study,6) Gold deposit ore-controlling model in Changgou area has been established.7) The prospecting indicators of this type of gold deposit is summarized.