磁性基底反演

发布时间：2018-03-06 16:26

本文选题：磁性基底　切入点：磁性界面反演　出处：《长安大学》2016年硕士论文　论文类型：学位论文

【摘要】：磁性基底为磁性地层的顶界面,而磁性地层顶界面的构造直接影响盆地内沉积的形态、构造和性质。所以研究磁性基底无论对于研究盆地的形成与演化,还是对于研究矿藏的分布都有极其重要的理论和实际价值。所以计算磁性基底的埋深,确定盆地的深部构造界面起伏是磁法勘探的重要任务之一。本文的研究内容为空间域磁性界面反演方法。空间域磁性界面反演方法的优势在于计算结果精确度高。在正演方面,对计算磁性界面磁异常的正演公式进行了推导,解决了磁性界面的正演问题。在反演方面,整合前人的空间域反演方法,通过选取不同平均深度对理论磁异常进行反演,通过误差分析,认为平均深度的选取对反演结果影响较大,在反演计算时,需要根据约束条件,合理的选取平均深度。最后利用该方法,对南海北部地区进行了磁性基底反演,得到了磁性基底的深度,认为该方法具有一定的适用性。
[Abstract]:As the magnetic basement top interface magnetic strata, tectonic and magnetostratigraphy top interface directly affects the basin sedimentary morphology, structure and properties. So the study of the magnetic basement for the formation and evolution of the basin, or for the distribution of mineral resources has important theoretical and practical value. So the calculation depth of the magnetic basement the ups and downs, the deep structure of the interface to determine the basin is one of the important tasks of magnetic exploration. The research content of this paper is the magnetic interface inversion method in spatial domain. The interface inversion method for spatial magnetic calculation results has the advantage of high precision. In this part, the forward calculation formula of magnetic interface magnetic anomalies are deduced to solve the problem, the forward magnetic interface. In the inversion, the spatial domain inversion method of the conformity of the former, by selecting different average depth of magnetic anomaly inversion theory, through error Difference analysis, select that average depth has great influence on the inversion results in the inversion calculation, according to the constraint conditions, the reasonable selection of the average depth. Finally, using this method, the area of the northern South China Sea of magnetic basement inversion, the depth of the magnetic basement, it is believed that this method has certain applicability.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P631.2

【参考文献】