丹麦格陵兰岛东部詹姆逊盆地铜多金属矿矿石特征及成因探讨

詹姆逊盆地铜多金属矿位于格陵兰东部铜铅锌成矿带。结合野外调查,利用光薄片显微鉴定,对詹姆逊盆地铜多金属矿矿石进行系统研究。根据矿石特征可分为砂岩型,构造破碎带型和硅质岩重晶石型三类矿石。综合矿床地质特征,认为该铜多金属矿是复合叠加型矿床,早期海底热水喷流沉积形成层状硅质岩重晶石型铜铅锌矿,之后在陆源碎屑沉积时形成砂岩型铜铅锌矿,后期含矿热液沿构造及砂岩层位充填交代、并对早期砂岩矿化层进一步热液叠加富集成矿。对该矿床的矿石特征及成因的总结,有助于推动该区的进一步找矿工作。

The ore characteristics and ore genesis of the copper-polymetallic deposit in the Jameson Land basin, Eastern Greenland, Denmark

The copper polymetallic deposit in the Jameson Land Basin is located in the Cu-Pb-Zn metallogenic belt, eastern Greenland. This paper combines field investigation and photomicroscopic identification to systematically study the copper polymetallic ore in the Jameson Land Basin. It can be divided into sandstone type, structural fracture zone type and siliceous rock barite type ore according to the characteristics of ore. Combined with the geological characteristics of the deposit, it is considered that the copper polymetallic deposit is a composite superimposed deposit. In the early stage, the hydrothermal exhalation formed layered siliceous barite type Cu-Pb-Zn deposits, then forms a sandstone type during terrigenous clastic sedimentation. The last ore-bearing hydrothermal fluid filled and replaced along the structure and sandstone horizon, and further hydrothermal superposition and enrichment of the early sandstone mineralized layer. A summary of the ore characteristics and genesis of the deposit will be helpful to further prospecting in the area.