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Three-dimensional inversion of magnetic data in the simultaneous presence of significant remanent magnetization and self-demagnetization: example from Daye iron-ore deposit, Hubei province, China

文献类型：期刊论文

作者Liu, Shuang1,2,3; Fedi, Maurizio2; Hu, Xiangyun1; Ou, Yang4; Baniamerian, Jamaledin2,5; Zuo, Boxin1; Liu, Yuegao6; Zhu, Rixiang3
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期2018-10-01
卷号215期号:1页码:614-634
ISSN号0956-540X
关键词Magnetic anomalies modelling and interpretation Rock and mineral magnetism Inverse theory
DOI10.1093/gji/ggy299
英文摘要Natural remanent magnetization and self-demagnetization on high-susceptibility bodies are two important factors affecting magnetic data inversion. We propose a framework for the inversion and interpretation of magnetic anomalies, in which significant remanent magnetization and self-demagnetization are present simultaneously. The framework is based on the assumptions that the external applied field and internal self-demagnetization field are uniform and the deflection of self-demagnetization in the total magnetization direction is negligible. First, the magnetization vector distributions are obtained from magnetic data by estimating the magnetization direction, then inverting for the magnetization intensity distribution, using the inferred magnetization direction as a constraint. Based on a priori information about the Koenigsberger ratio derived from petrophysical measurements, the direction and intensity of the remanent magnetization are obtained. The self-demagnetization factor is then computed using the finite volume method. Finally, the true-susceptibility distribution is achieved by correcting for the self-demagnetization effect. The method is first applied to synthetic magnetic data produced by a prism-shaped source model that has significant remanent magnetization and high susceptibility. In a case study of the Daye iron-ore deposit, Hubei province, China, the true susceptibility and remanent magnetization are reconstructed. The remanence direction information reveals that local geological activities such as synclines and faults lead to changes in the remanence directions at different local deposits.
WOS关键词NORMALIZED SOURCE STRENGTH ; VECTOR INVERSION ; TOTAL MAGNITUDE ; ERROR ANALYSIS ; DIRECTION ; 3D ; ANOMALIES ; SURFACE ; 2D ; GRAVITY
资助项目National Natural Sciences Foundation of China[41604087] ; National Natural Sciences Foundation of China[41630317] ; National Natural Sciences Foundation of China[41674110] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUGL170407] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUG160609] ; China Postdoctoral Science Foundation[2016M590132] ; Natural Sciences Foundation of Hubei Province[2016CFB122]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000448242600037
资助机构National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Sciences Foundation of Hubei Province ; Natural Sciences Foundation of Hubei Province ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Sciences Foundation of Hubei Province ; Natural Sciences Foundation of Hubei Province ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Sciences Foundation of Hubei Province ; Natural Sciences Foundation of Hubei Province ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Sciences Foundation of Hubei Province ; Natural Sciences Foundation of Hubei Province
源URL[http://ir.iggcas.ac.cn/handle/132A11/89158]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Hu, Xiangyun
作者单位1.China Univ Geosci, Inst Geophys & Geomat, Hubei Subsurface Multiscale Imaging Key Lab, Wuhan, Hubei, Peoples R China
2.Naples Univ Federico II, Dept Earth Environm & Resources Sci, Naples, Italy
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.Chinese Acad Geol Sci, Inst Geophys & Geochem Explorat, Langfang, Peoples R China
5.Grad Univ Adv Technol, Coll Sci & Adv Technol, Dept Earth Sci, Mahan, Iran
6.China Geol Survey, Xian Ctr, Minist Land & Resources, Key Lab Study Focused Magmatism & Giant Ore Depos, Xian, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Shuang,Fedi, Maurizio,Hu, Xiangyun,et al. Three-dimensional inversion of magnetic data in the simultaneous presence of significant remanent magnetization and self-demagnetization: example from Daye iron-ore deposit, Hubei province, China[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2018,215(1):614-634.
APA Liu, Shuang.,Fedi, Maurizio.,Hu, Xiangyun.,Ou, Yang.,Baniamerian, Jamaledin.,...&Zhu, Rixiang.(2018).Three-dimensional inversion of magnetic data in the simultaneous presence of significant remanent magnetization and self-demagnetization: example from Daye iron-ore deposit, Hubei province, China.GEOPHYSICAL JOURNAL INTERNATIONAL,215(1),614-634.
MLA Liu, Shuang,et al."Three-dimensional inversion of magnetic data in the simultaneous presence of significant remanent magnetization and self-demagnetization: example from Daye iron-ore deposit, Hubei province, China".GEOPHYSICAL JOURNAL INTERNATIONAL 215.1(2018):614-634.

入库方式： OAI收割

来源：地质与地球物理研究所

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