山东招远–平度断裂带二维地震剖面研究及其地质意义

Two-Dimension Seismic Profile Research and Its Geological Significance of Zhaoyuan-Pingdu Fracture Zone in Shandong Province

自从地震勘探技术成为一种常规勘探方法以来,地震勘探技术始终处于不断改进之中。近几年在金属矿深部勘查中,地震勘探技术的应用逐步得到重视和推广,地震数据处理技术的提高使得地震勘探的精度得到很大的提升,其应用范围逐步扩展,与地震测量相结合的多元信息融合成为开展成矿预测、寻找深部隐伏矿的发展方向。本文在研究招平断裂带地质概况的基础上,以通过大尹格庄金矿的招平断裂带为重点,利用二维地震勘探,完成地震资料的采集、处理和解释工作,探索地震勘查对非层序地层区断裂构造带的解译效果。地震剖面较好的揭示了招平断裂带东西两侧及深部地质体结构特征及差异,清晰地的显示了控矿构造线性特征、多期岩浆活动形成的界面以及后期构造活动对控矿构造的影响,为分析区内断裂构造深部特征和活动期次、岩浆侵入界面和期次划分、构建岩浆–构造格架和建立已知金矿的地震物理勘查找矿模型提供了佐证。二维地震在招平断裂带研究效果显示良好,该数据的取得对胶东地区的深部找矿具有重要的指导意义。

The seismic exploration has become an ordinary exploration method since it was founded and seismic exploration techniques have always been continuously developed. The application of seismic exploration techniques for metallic ore exploration is a new and promising technique, and has gained more attentions. The interpretation precision and application degree of seismic explo-ration techniques can be improved by high precision seismic prospecting method and advanced data processing technique. The technique of coupling seismic exploration and seismic surveying is the developing direction of mineralization prediction and geophysics prospecting for concealed deposit. Based on the geological condition research of Zhaoping fault zone, this paper chose a typical part through Dayingezhuang mining area of Zhaoping fault zone as the object, and focused on the 2D seismic prospecting data acquisition, actual seismic data processing and seismic interpretation, and gained a better effect. The available seismic sections with high quality for structure interpretation have been obtained in the study area. Result of tomography reveals the deep-seated structural features, the linear feature of ore-controlling structure and the contact surfaces among different geologic bodies clearly. These researches will facilitate the depth study of the deep structure features, large-scale tectono-magmatic activities, the tectono-magmatic evolutionary history, and will be helpful for the setting of seismic exploration ore-prospecting model. The successful application of 2D seismic prospecting technology is very important for the deep mineral exploration in Jiaodong area.