青海大格勒沟脑金矿床地质特征及成矿作用探讨

The Geological Characteristics and Mineralization of Dagelegounao Gold Deposit in Qinghai Province

通过于大格勒沟脑金矿区开展基础地质工作,分析矿床的地质特征和控矿因素,探讨矿床成因和成矿作用。该金矿床矿(化)体赋存于NE向破碎蚀变带中,且受断裂构造控制明显;硅化、黄铁矿化和绢云母化等围岩蚀变与金成矿关系密切;矿床成因类型为构造蚀变岩型金矿床,成矿机理为大规模构造活动及远程岩浆活动所产生的含矿热液沿区域性断裂带运移,并在断裂带内沉淀富集成矿。

Based on basic geological work in Dagelegounao gold mining area, we have analyzed the geological characteristics and controlling factors of ore deposits to discuss about the genesis and mineralization of the deposits. The gold ore bodies were developed in NE trend fracture zones and they were controled by the fault structures obviously. The surrounding rock alteration, such as silicification, pyrite and sericitization, will be closely related to gold mineralization. The genetic type of deposit was tectonic altered rock type gold deposit. The hydrothermal fluid from largescale tectonic activities and remote magmatic activities are transported along the regional fault zone.They are concentrated in the fault zones.