蒙古国东部巴彦东铅锌矿地质特征及找矿方向

Geological feature and prospecting direction of Bayanduun Pb-Zn deposit in eastern Mongolia

位于蒙古国东部的巴彦东铅锌矿,区域上处于南克鲁伦成矿带内,有著名的有色金属矿山与之相毗邻。在现有的资源量估算边界外侧,矿体还未圈闭。在该矿区周围及深部仍然有较大的找矿空间。矿体主要受细粒黑云母花岗岩及其外侧的矽卡岩控制,NW向张性断层对矿体的就位亦有重要的控制作用,岩性与构造是该矿床形成的联合控制因素。同时矿体位于布格重力异常区以及正、负磁异常的急剧梯度带内。下步找矿工作重点应当在深部投入必要的钻探工作,同时应注意研究外围的矽卡岩分布区物、化探异常特征。

Bayanduun Pb-Zn deposit is regionally located in South Kerulen metallogenic belt in east Mongolia, which is adjacent to some famous nonferrous metal ore deposits. The orebodies do not close up outside the borderline of mineral resources estimation. There is potential exploration space in the deep place and around the whole mine. The orebodies is mainly controlled by the fine-gained biotite granite and its outside skarn. NW tensile faults are an important factor to control the orebody emplacement, and lithology and structure are the associative controlling factors of this deposit formation. Meanwhile the orebodies are located within the Bouguer gravity anomaly area and within the steep gradient belt from positive to negative magnetic anomaly. The key of next prospecting stage should be focus on the necessary drilling work in the deep position. Never theless, the research should be paid more attention to the geochemical and geophysical anomaly characteris- tics in the periphery sharn distribution area.