Fast 3D Focusing Inversion of Gravity Data Using Reweighted Regularized Lanczos Bidiagonalization Method

被引:24
|
作者
Rezaie, Mohammad [1 ]
Moradzadeh, Ali [2 ]
Kalate, Ali Nejati [1 ]
Aghajani, Hamid [1 ]
机构
[1] Shahrood Univ Technol, Sch Min Petr & Geophys Engn, Shahrood, Iran
[2] Univ Tehran, Sch Min, Coll Engn, Tehran, Iran
关键词
Gravity data; focusing inversion; Lanczos bidiagonalization; conjugate gradient; regularization; MAGNETIC DATA; GEOPHYSICAL INVERSION; 3-D INVERSION; COMPRESSION;
D O I
10.1007/s00024-016-1395-8
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Inversion of gravity data is one of the important steps in the interpretation of practical data. One of the most interesting geological frameworks for gravity data inversion is the detection of sharp boundaries between orebody and host rocks. The focusing inversion is able to reconstruct a sharp image of the geological target. This technique can be efficiently applied for the quantitative interpretation of gravity data. In this study, a new reweighted regularized method for the 3D focusing inversion technique based on Lanczos bidiagonalization method is developed. The inversion results of synthetic data show that the new method is faster than common reweighted regularized conjugate gradient method to produce an acceptable solution for focusing inverse problem. The new developed inversion scheme is also applied for inversion of the gravity data collected over the San Nicolas Cu-Zn orebody in Zacatecas State, Mexico. The inversion results indicate a remarkable correlation with the true structure of the orebody that is achieved from drilling data.
引用
收藏
页码:359 / 374
页数:16
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