摘要
前人根据矿体的产出受碳酸盐岩层位控制和Pb同位素模式年龄资料 ,多认为硫磺山铜多金属矿床为层控型铜铅锌多金属矿床 ,其形成时代为奥陶纪。基于矿区石英斑岩体见矿化和矿化蚀变 ,矿体与围岩呈渐变关系等特点 ,笔者主张该矿床属斑岩型铜铅锌多金属矿床。年代学研究表明 ,含矿石英脉Rb Sr等时线年龄 (346± 30Ma)与石英斑岩的锆石U Pb年龄(340～ 36 0Ma)在测定误差范围内一致 ,表明成岩与成矿作用均发生在早石炭世—晚泥盆世 。
Based on the lead model age and the phenomenon that Cu-Pb-Zn orbodies are controlled by carbonate of the Ordovician Liuhuangshan Group,It was previously considered that the Liuhuangshan Copper-polymetallic deposit was of stratabound type formed in Ordovician. In view of the facts that the quartz porphyry in the orefield has been mineralized and the orebodies show transitional relationship with the porphyry, the authors believe that the deposit should be a porphyry Cu-Pb-Zn polymetallic one. Isotopic chronological studies show that the fluid inclusion Rb-Sr isochron age(346±30 Ma)of mineralized quartz veins is consistent with the zircon U-Pb age(340～360 Ma)of quartz porphyry in test errors,suggesting that the rock-forming and ore-forming events occurred during Early Carboniferous to Late Devonian and the ore-forming process is related to the porphyry in time and space.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2003年第6期555-558,共4页
Acta Geoscientica Sinica
基金
国家重点基础研究发展规划项目 (编号 :G19990 43 2 0 1和 2 0 0 1CB40 9810 )
国家科技攻关计划"新疆优势矿产资源勘查综合研究"(编号 :2 0 0 1BA60 9A 0 7 18)资助
关键词
铜多金属矿床
成岩作用
成矿作用
同位素地质年代学
copper-polymetallic deposit rock-forming and ore-forming eventsisotopic chronology Liuhuangshan East Tianshan Mountains
