高精度磁法测量在河南安林地区西牛良–红瓦房深部找矿中的应用

Application of High Precision Magnetic Survey in Deep Exploration of Xiniuliang-Hongwafang, Anlin Area, Henan

摘要: 高精度磁法测量是安林地区深部找矿必不可少的技术手段之一。研究区物性特征表明矿石和围岩存在明显的磁性差异，这为后续利用地面高精度磁测圈定磁铁矿体奠定了物性前提。高精度磁法测量原始数据显示磁异常整体比较凌乱、分散，通过△T化极、上延等数据处理，在西牛良–红瓦房一带发现了M13、M14两个异常。M13异常为主异常，分为M13-1与M13-2两个异常，其中M13-1推测该处高磁异常为含磁性老地层抬升引起，M13-2推测为太古宇登封杂岩局部抬升所致。M14异常位于安林地区西成矿带边缘，推测为安林西矿带的南部末端异常，为有望异常。实施的钻探工程验证了异常的可靠性，表明了高精度磁法测量在安林地区西牛良–红瓦房一带深部找矿中的有效使用，促进了找矿突破。

Abstract: The high-precision magnetic survey is one of the most important technologies for deep exploration of Anlin area. The physical properties of the study area indicate strong magnetic differences between ores and surrounding rocks which will lay the physical premise for the future use of high-precision magnetic survey to bind the magnet body. For the generally messy and scattered magnetic anomalies of the raw data of the high-precision magnetic survey, through the processing methods of the △T polar, upward continuation, etc., two anomalies of M13 and M14 along Xiniuliang-Hongwafang area are found. The anomaly of M13 is the main anomaly, which is divided into M13-1 and M13-2 anomalies. The anomaly of M13-1 is caused by the rise of old magnetic strata and the M13-2 by the part rise of Dengfeng-complex rock of Archaeozoic Era. The anomaly of M14 in the edge of the west ore belt of Anlin area may be at the southern end and it is possible to find the ores. Drillings have verified the reliability of the anomalies and the effective application of the high-precision magnetic survey in deep exploration of Xiniuliang-Hongwafang in Anlin area, and have promoted the breakthrough of prospecting.