内蒙古常福龙金矿床地质特征、成矿模式及其地质意义

内蒙古常福龙金矿床位于华北克拉通北缘金成矿带以西乌拉山—大青山金成矿带内,为一断裂构造和热液蚀变控制明显的脉型金矿床,主要与硅化和钾化热液蚀变有关。矿区地质特征表明该矿床经历多期成矿叠加,主成矿期热液蚀变主要分3期,早期以面状的硅化-绿泥石化为主;中期成矿阶段以脉状的硅化、钾化和黄铁绢英岩化为主;晚期以面状或脉状的碳酸盐化和高岭土化为主。通过对该矿床的研究,建立矿床地质成因模式,探讨常福龙金矿床的形成机制与主要控矿地质因素,认为该矿床的东南部和北西部是很好的找矿空间,应进一步在该地区的深部加强找矿工作。

Geological characteristics, metallogenic patterns and geologicalsignificances of Changfulong gold deposit in Inner Mongolia

Changfulong gohl deposit is located west Wulashan-Daqingshan gohl metallogenic belt, to the north margin of the North China Craton. The gold deposit is obviously controlled by a fault structure and hydrothermal aher- ation mainly related to the silicide and potassium alteration. Geological ｜eatures of the mining area suggest that the de- posit formed chronically through several metallogenie periods and that hydrothermal aheration in major periods is di- vided to three stages. Early hydrothermal aheration was dominantly large-scale silieide and chloritization; veined silt- tide, potassium and sericitization alteration prewiled in middle stage; And in the last stage, hydrothermal alteration was veined carbonation and planar kaolinization. Based on geological researches, a geological metallogenie pattern is eslalllished to discuss the metallogenisis mechanism and major ore-controlling factors of the deposit. Finally the forma- tirol of Changfulong deposit implies great metallogenie potentials for gohl southeast and northwest the deposit. Mining companies could do some more exphrration deep in Ihis region.