重磁解释中健全的极大似然法及三维反演

本文介绍了JOAO.B.C.SILVA提出的重磁解释中健全的(Robust)极大似然反演方法的基本原理,讨论了重力二度体非线性几何参数的反演情况,并将该方法扩展到三维重、磁非线性几何参数反演中。重点讨论了场值中有较大随机干扰、有不同类型的地质噪音源影响下的反演结果。理论反演结果表明,该方法有比最小二乘反演方法更接近实际的解,从而提高了解的可靠性,对于重磁局部异常或孤立异常有较好的反演效果。

THE ROBUST MAXIMUM LIKELIHOOD METHOD AND THE THREE-DIMENSIONAL INVERSION IN GRAVITY AND MAGNETIC INTERPRETATION

This paper presents the fundamental principles of robust maximum likelihood invevse method for gravity and magnetic interprtation devoloped by Joao B. C. Silva(1989).The inversion of nonlinear geometric parameters of 2-D gravity body is discussed and extended into the inversion of nonlinear geomotric parameters of 3-D gravity and magnetic body.Emphasis is put on the inversion result under the influence of major random noise and a variety of geological noise sources in the field. Result from theoretical inversion suggests that this method has a solution closer to reality than the least square inversion procedure: therefore, it increases the reliability of solution and supplies a fairly good inversion result for local and isolated gravity and magnetic anomaly.