综合物探方法在陈店磁异常查证中的应用

Application of Integrated Geophysical Method in Chendian Magnetic Anomaly Verification

为查证陈店异常源,探索舞阳—新蔡铁成矿带上覆盖区深部寻找铁矿化体的有效物探组合方法,利用地面高精度磁法剖面测量、地面高精度重力剖面测量等综合物探方法对陈店磁异常进行研究,在物探综合剖面异常推测解释的基础上布设钻孔进行验证。结果表明,陈店磁异常为深部铁矿化体引起的矿致异常,铁矿化体赋存于太古宇太华岩群地层内,埋深较大;重磁反演推断了区内地层结构、构造格架及磁性体的空间分布特征。

In order to verify the abnormal source of Chendian and explore the effective geophysical combination method for finding iron mineralized bodies in the deep overburden area of Wuyang-Xincai iron metallogenic belt,the magnetic anomaly of Chendian was studied by comprehensive geophysical methods such as ground high-precision magnetic profile measurement and ground high-precision gravity profile measurement.Based on the speculation and interpretation of integrated geophysical profile anomalies,boreholes are laid for verification.The results show that Chendian magnetic anomaly is caused by deep iron ore bodies.The iron ore bodies occur in Archean Taihua Group strata,and the buried depth is large.The gravity and magnetic inversion inferred the spatial distribution characteristics of the stratigraphic structure,tectonic framework and magnetic body in the area.