内蒙狼山成矿带东升庙多金属硫铁矿床成矿特征及成因探讨

东升庙多金属硫铁矿床产于中元古界狼山群一套细碎屑-碳酸盐岩含矿建造中。矿床受元古宙裂陷槽次级断陷盆地控制，具时控、层控性。据容矿岩石、矿石矿物微量元素和硫、碳、氧、铅同位素及稀土元素分析研究，认为矿床具有多阶段成矿特点，矿床成因类型属海底喷气沉积-弱改造型矿床。

Ore-Forming Characteristics And Genetic Discussion Of The Dongshengmia0 Polymetallic Pyrite Deposits In The Langshan Metallogenic Belt, Inner Mongolia

The Dongshengmiao polymetallic sulfide deposit in Inner Mongolia occurs in the ore-bearing formation of Middle Proterozoic Langshan Group comprising a suite of fine clastic rocks-carbonate rocks. The ore deposit is controlled by the second-order fault basin of the Proterozoic faulted trough, exhibiting time-bound and stratabound character. Orebodies assume stratiform and stratoid forms, with the major ore minerals being pyrite, pyrrhotite, sphalerite, galena and chalcopyrite. Studies of host rocks, ore minerals, major and minor elements, sulfur, carbon, oxygen and lead isotopes and rare earth elements reveal the multi-stage mineralization character of the ore deposit with the evolution of materials in the ore deposit showing obvious regularity. The ore-forming process proceeded gradually from sedimentation to exhalation-hydrothermal sedimentation. Genetically, the ore deposit is of submarine exhalation sedimentary-weakly reformed type.