低磁纬度磁界面反演

指出了低磁纬度地区化极存在的误差,研究了磁异常数据的模拟退火反演方法,以立方体单元剖分网格充填磁场参数后模拟磁界面,同时反演磁界面,并结合模拟退火非线性算法的特点,研究易于加入约束条件的、方式灵活的建模方法,设计磁异常结构较复杂的模型.通过模型试验和实际资料处理,验证了该方法的正确性.

Magnetic Interface Inversion at Low Magnetic Latitudes

The characteristics of magnetic anomalies in low magnetic latitude area are very different to those in middle and high latitude area, and magnetic strike directions near the equator are horizontal. If the inversion method is to use perpendicular magnetic under the condition of magnetic anomaly data, which is first to reduce the magnetic anomalies in different latitudes to pole, undoubtedly, it will produce large errors. For these reasons, it is necessary for magnetic interface inversion study in low magnetic latitude area. This paper points out the problem in methods of reduction to pole in the low magnetic latitude area, and simulated annealing method is used in the model under the condition of oblique magnetization to inverse the magnetic anomalies. Feasibility is proved through model test, and this method is applied to the process of field data, good effects are achieved.