摘要
燕辽铜钼多金属成矿带位于华北地台北缘,是中国中生代重要的多金属成矿带之一。带内矿床成因类型多样。在前人研究成果的基础上,通过对燕辽铜钼多金属成矿带内冀东和冀北地区的典型矿床进行综合对比分析,开展矿床地质背景、成岩机制、成矿作用等方面的探讨,总结了矿床的成因特征及其与岩浆活动的关系,梳理了冀东和冀北地区燕辽铜钼多金属成矿带燕山期的成矿地球动力学背景及演化过程。通过对比发现,冀东和冀北燕辽成矿带内铜钼矿床均受到区域性断裂构造的控制,与高硅后碰撞花岗岩关系密切,矿床以中高温特征为主,成矿流体不混溶特征多见。带内成岩时代主要集中在中生代,成岩与成矿时代相近,钼矿化集中于中-晚侏罗世,而铜矿化则主要发生于早白垩世。矿床形成的地球动力学背景和成矿流体性质的差异导致了铜矿化和钼矿化的不同特征。
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.
作者
冯云磊
李佳谕
许少培
李春蕾
王丰翔
刘育
FENG Yunlei;LI Jiayu;XU Shaopei;LI Chunlei;WANG Fengxiang;LIU Yu(Hebei GEO University,Shijiazhuang 050031,China;Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2024年第6期9-18,共10页
Journal of Hebei Geo University
基金
河北省自然资源厅科研项目(Z2024044)
河北省斑岩型矿床研究重点实验室开放基金(HBBY202401)
河北省自然科学基金资助项目(D2022403039)。
关键词
燕辽成矿带
铜矿
钼矿
成矿作用
成矿时代
the Yanshan-Liaoning polymetallic belt
copper deposit
molybdenum deposit
mineralization
mineralization ages
