内蒙古四子王旗夏尔楚鲁金矿床地质特征及成因

夏尔楚鲁金矿床位于白乃庙-温都尔庙古陆块晚古生代活动陆缘带内.金矿围岩为白音宝拉格组变质岩系和早三叠世黑云母花岗岩，矿体赋存在断裂构造破碎带中，受近南北向断裂构造控制.金矿体为含金石英脉，具有膨大、分支、复合特征.系统总结了矿石矿物组成、结构构造特征，认为金属矿化与硅化、绢英岩化、黄铁矿化、辉钼矿化等蚀变作用有关.成矿作用发生在伸展地球动力学环境下，控矿构造具有多阶段活动的特点，矿床的成因类型为岩浆期后热液型金矿床.

GEOLOGY AND GENESIS OF THE XIAERCHULU GOLD DEPOSIT IN INNER MONGOLIA

The Xiaerchulu gold deposit is tectonically located in the Late Paleozoic active continental margin in the Bainaimiao-Wenduermiao ancient landmass.The wall rocks of the deposit involve the metamorphic series of Baiyinbaolage Formation and the biotite granite of Early Triassic.The orebodies occur in the structural fracture zones,controlled by N-S-trending faults.The Au-bearing quartz veins are characterized by expanding,brenching and merging.Study on the mineral assemblage,structure and texture of the ore shows that the mineralization is related to the alterations of silicification,phyllication,pyritization and molybdenitization.The metallogenesis took place under the extensive geodynamic environment.The ore-controlling structures moved in multiple stages.The gold deposit genetically belongs to post-magmatic hydrothermal fluid type.