基于低秩稀疏分解的重磁异常分离方法及应用

张紫薇, 李厚朴, 张恒磊, 朱丹

A low-rank decomposition-based method for separating gravity and magnetic anomalies and its application

ZHANG Zi-Wei, LI Hou-Pu, ZHANG Heng-Lei, ZHU Dan

图4 不同方法将A异常与叠加场分离得到的局部磁异常(a1~a3)和区域磁异常(b1~b3) (a1、b1—是本文方法采用λ=0.022 5得到的结果;a2、b2—是滑动窗口平均采用窗口大小为31×31时得到的结果;a3、b3—是小波多尺度分析采用5阶小波细节得到的结果)

Fig.4 The potential field separations using different methods (a1、b1—the residual anomalies and regional anomalies using the low-rank decomposition with a balance parameter of λ=0.022 5; a2、b2—the residual anomalies and regional anomalies using the sliding window average method with a window size of 31×31; a3、b3—the residual anomalies and regional anomalies using the wavelet analysis method with 5 orders details