纳米比亚北部隐伏断裂构造的航磁异常解释

An interpretation of magnetic anomalies of the buried faults in north Namibia

对纳米比亚北部EPL4305矿权区及外围的航磁异常数据,采用多种不同的方法进行处理,并对比处理前后的异常特征,结合地质资料,推断了多条断裂构造带。在重点地段切取图切剖面,进行2.5D正反演计算,以进一步验证推断的隐伏断裂构造带的可靠性。

The aeromagnetic survey method can be applied to direct prospecting,indirect prospecting,inferring geological structures,large-scale geophysical measurement,geological mapping and searching for groundwater.Its interpretation methods have introduced many foreign high-technology and related interpretation system software,which greatly promotes China＇s airborne geophysical prospecting.The linear magnetic anomaly zones,blocky and arc-shaped blocky magnetic field regions displayed in aeromagnetic maps are genetically associated with large and super-large deposits,and deep faults reflected by aeromagnetic anomalies are closely related to metallogenic belts.This study processed the aeromagnetic data of the mine EPL4305 and its adjacent regions in north Namibia with a variety of different methods,and inferred a number of fault structural belts through a comparison of the pre-processing and processed anomalies and integrating with geological data.In addition,cutting sections were obtained in key blocks for 2.5D forward and inversion,to further validate the reliability of these inferred buried fault belts.