Geochemistry and Mineralization of the Eastern and Northern Hebei Regions within the Yanshan-Liaoning Copper-Molybdenum Polymetallic Belt
The Yanshan-Liaoning copper-molybdenum polymetallic belt,situated along the northern margin of the North China Craton,is one of the significant Mesozoic metallogenic belts in China.This belt hosts a diverse range of deposit types.Based on previous research,this study presents a comparative analysis of representative ore deposits from the eastern and northern Hebei regions within the belt.The study summarizes the genetic characteristics of these deposits and their relationship with magmatic activity,outlining the geodynamic background and evolutionary processes of mineralization during the Yanshanian period in the northern and eastern Hebei regions within the polymetallic belt.Furthermore,a close genetic association with high-silica,post-collisional granitoids is evident.These deposits typically exhibit medium to high-temperature characteristics,with evidence of fluid immiscibility commonly observed in the ore-forming fluids.The magmatic events within the belt are primarily concentrated in the Mesozoic,with the emplacement ages of mineralization-related intrusions closely corresponding to the timing of ore formation.Notably,molybdenum mineralization is mainly restricted to the Middle-Late Jurassic,whereas copper mineralization primarily occurred during the Early Cretaceous.The distinct features of copper and molybdenum mineralization can be attributed to variations in the geodynamic setting and the physicochemical properties of the mineralizing fluids.
the Yanshan—Liaoning polymetallic beltcopper depositmolybdenum depositmineralizationmineralization ages
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