宁芜火山岩盆地及周缘重磁场多尺度边缘检测与地质意义

Multi-scale Edge Detection of Gravity and Magnetic Fields in the NingwuVolcanic Basin and Its Surrounding Areas and Their Geological Significance

宁芜火山岩盆地位于长江中下游成矿带,在盆地内发育了以玢岩型铁矿为主的宁芜矿集区,是中国重要的铁矿资源基地。经过多年勘探和开发,浅部矿床基本已经查明,深部找矿已经成为解决接替资源这一突出问题的主要方向。但受火山岩和第四系覆盖,宁芜盆地隐伏构造和隐伏岩体还未完全查明,制约了找矿预测。利用覆盖宁芜盆地及周缘的重力和航磁数据,通过多尺度边缘检测方法,增强和提取了地下地质体的边界。结合地质资料综合分析,厘定15条断裂构造,推测8个隐伏岩体,为宁芜矿集区找矿预测提供了支撑。

Ningwu volcanic basin is located in the Middle-Lower Yangtze River metallogenic belt,and has developed a Ningwu ore concentration area mainly composed of porphyritic iron ore.Which is an important iron ore resource in China.After several years of exploration and development,shallow mineral deposits have been basically identified,and deep mineral exploration has become the main direction to solve the problem of superseding resources.However,due to the coverage of volcanic rocks and the Quaternary,the hidden structures and hidden rock masses in the Ningwu Basin have not been fully identified,which restricts the exploration and prediction.Gravity and aeromagnetic data were utilized which was covering the Ningwu Basin and its surrounding areas to enhance and extract the boundaries of underground geological bodies through multi-scale edge detection methods.Based on comprehensive analysis of geological data,15 fault structures have been identified and 8 hidden rock masses have been speculated,and has providing support for ore exploration and prediction in the Ningwu mining area.