中文摘要：

以基础地质和矿床成矿地质特征研究为导向,高精度磁法测量为手段,在齐大山矿区及其周边获取了大量高精磁异常数据,通过对磁测数据进行系统的化极、解析延拓和方向求导等处理,压制干扰信息,突出不同深度有用矿致异常信息,与地质规律研究相结合,查明了区内隐伏构造发育和分布情况,厘清了矿（化）体的空间分布特征和规律,为齐大山铁矿床的深边部探矿增储提供了理论依据和技术指导,也为区域BIF铁矿床的攻深找盲提供了借鉴.

英文摘要：

Based on the basic geological characteristics and ore-forming geological characteristics, a large number of high- precision magnetic anomaly data of Qidashan mining area and its surrounding area are obtained by adopting the high-precision magnetic survey method. The magnetic survey data are processed systematically, including reduction to the pole, the analytic continuation and direction derivation so as to suppress the interference information and highlight the useful mineral-induced ab- normal information of ores in different depth. Combined with the research results of geological regularity, the development and distribution of concealed structures in Qidashan mining area are identified and the spatial distribution characteristics and regu- larities of orebodies in this area are clarified in detail. Therefore, the research results provide theoretical basis and technical guidance for prospecting for reserves increase in deep and marginal exploration in Qidashan iron deposit, but also provide refer- ence for exploration of deep and hidden orebodies in regional BIF-type iron ore deposits.