对应分析约束下的重磁联合反演及其在塔里木盆地的应用

SIMULTANEOUS INVERSION OF GRAVIMETRIC AND MAGNETIC DATA CONSTRAINED WITH INTERNAL CORRESPONDENCE ANALYSIS AND ITS APPLICATION TO THE TARIM BASIN

综合应用重磁对应分析和重磁联合反演的基础上提出对重磁联合反演的一种改进方法：约束联合反演，即利用重磁异常相关系数对联合反演中目标函数进行加权。实验结果表明，该方法有利于迭代反演的收敛性。把该方法应用于塔里木盆地东部库尔勒～若羌剖面，结果说明，以对应分析的结果作为先验认识，有助于合理地建立最优化反演的初始模型，能提高解释结果的质量。

Gravimetric and magnetic data are useful to study the deep geologic structures,but interpretation is usually difficult because of the multi-solutions of inversion and complex field geology.We have developed an enhanced technique of constrained simultaneous inversion based on the classical inversion and internal correspondence analysis (ICA) ,which is to weight the object function of simultaneous inversion with relation coefficients of the gravimetric and magnetic data.The theoretical modeling results show that the new technique is helpful to the convergence of iteration.Appliation of this method to the Kuerle-Ruoqiang profile of the Tarimu basin shows that a reasonable initiative model for further optimistic iteration can be established with the help of the information from the ICA.