地震频率谐振技术在内蒙古额尔古纳东珺银铅锌矿区勘查中的应用

内蒙古自治区额尔古纳市东珺银铅锌矿床属于浅成低温热液型矿床，浅部已控制的陡脉状与缓倾斜银、铅、锌矿体资源储量已达到大型规模。对浅部数据的处理解译并结合成矿地质条件分析认为，缓倾斜矿体赋存于一套波阻抗值相对较低的层间破碎带内，在其下部存在含矿构造带。为探获与成矿相关的热液上升通道，在矿区内应用地震频率谐振技术进行剖面性勘查工作，探测陡倾角断裂的结构和位置信息，以实现深部更大的资源量突破。通过地震频率谐振勘探所获得的波阻抗特征和已有钻孔及新钻孔等地质资料，证实了矿区深部的确存在与构造有关的厚大矿体的认识。地震频率谐振勘探的高精度视波阻抗勘查成果为本区深部探测提供了明确的目标和靶点。

Application of seismic frequency resonance technique in the exploration of the Dongjun Ag-Pb-Zn deposit in Erguna, Inner Mongolia

The Dongjun silver-lead-zinc deposit in Eerguna, Inner Mongolia belongs to a shallow low-temperature hydrothermal type deposit. The shallow reserves of detected ore bodies with steep veins and gentle inclines, including silver, lead, and zin, have reached a large scale. The data processing and interpretation of shallow reserves and the analysis of geological ore-forming conditions reveal that the ore bodies with gentle inclines exist in a set of interlayer fracture zones with relatively low wave impedance. In addition, there is an ore-bearing tectonic zone underneath. In order to explore hydrothermal fluid ascending channels related to ore-forming, this study used seismic frequency resonance technique for cross-sectional exploration in the mining area, so as to detect structural and locational information of steep dip angle faults and discover more deep resources. Based on the wave impedance characteristics obtained from exploration with seismic frequency resonance technique and geological data of preexisting and new boreholes, this study confirmed the existence of tectonic-related thick ore bodies in the deep part of the mining area. The high-precision apparent wave impedance results of seismic frequency resonance exploration provide clear targets for deep exploration in this mining area.