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Modified reduction to the pole using the estimated total magnetisation direction and variable geomagnetic inclination: application to the Sichuan Basin
Liu, Kang1,2,3; Hao, Tianyao1,2,3,5; Wen, Baihong4; Yang, Hui4
2019-10-11
Source PublicationEXPLORATION GEOPHYSICS
ISSN0812-3985
Pages15
AbstractProcessing and interpretation of magnetic data, such as reduction to the pole (RTP), forward and inverse modelling, etc., usually require knowledge of the total magnetisation direction. Magnetisation of subsurface sources is often oblique to the geomagnetic field direction, due to remanent magnetisation, anisotropic induced magnetisation or, for sources with high susceptibility, self-demagnetisation. In order to re-place the magnetic anomalies above their causative sources, a mathematical transformation called RTP is required. RTP processing is usually performed without considering the impact of remanent magnetisation and directly uses the induced magnetisation direction (or geomagnetic field direction) as the total magnetisation direction, resulting in possible misinterpretation of the actual geology. Because the total gradient of the RTP data defines the envelope for the vertical gradient, the two gradients should achieve maximum symmetry after RTP processing that uses the correct total magnetisation direction. The RTP processed anomaly then corresponds to the vertical field anomaly for a vertically magnetised source. Based on this consideration, the total magnetisation direction of the magnetised body is estimated by calculating the cross-correlation between the two gradients. Introducing total magnetisation factors into the RTP operator in the frequency domain and using the Taylor formula, both of which have been proven to be practical by previous studies, we propose a modified reduction to the pole (MRTP) method taking the total magnetisation direction and variable geomagnetic inclination into consideration. Model computations and the practical applications to the Sichuan Basin indicate that this method can characterise oblique magnetisation, which is due to strong remanent magnetisation of igneous rocks, and improve the accuracy of magnetic data processing and geological interpretation.
KeywordMagnetisation directions remanent magnetisation total magnetisation differential reduction to the pole gradient cross-correlation
DOI10.1080/08123985.2019.1639365
Funding OrganizationSpecial Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China
WOS KeywordTO-THE-POLE ; DIFFERENTIAL REDUCTION ; GAS-FIELD ; REMANENT ; CHINA
Language英语
Funding ProjectSpecial Projects of Geologic Surveys of Ministry of National Lands and Resources of China[GZH200900504-207] ; National Natural Science Foundation of China[41476033] ; National Natural Science Foundation of China[91858212] ; National Natural Science Foundation of China[U1505232] ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction"[GASI-GEOGE-01] ; National Key Research and Development Program of China[2016YFC0601102] ; National Key Research and Development Program of China[2016YFC0601104] ; National Science and Technology Major Project of China[2016ZX05004003]
Funding OrganizationSpecial Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000489737400001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93905
Collection油气资源研究院重点实验室
Corresponding AuthorHao, Tianyao
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Marine Sci, Beijing, Peoples R China
4.Res Inst Petr Explorat & Dev, Dept Petr Geophys, Beijing, Peoples R China
5.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou, Zhejiang, Peoples R China
First Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Kang,Hao, Tianyao,Wen, Baihong,et al. Modified reduction to the pole using the estimated total magnetisation direction and variable geomagnetic inclination: application to the Sichuan Basin[J]. EXPLORATION GEOPHYSICS,2019:15.
APA Liu, Kang,Hao, Tianyao,Wen, Baihong,&Yang, Hui.(2019).Modified reduction to the pole using the estimated total magnetisation direction and variable geomagnetic inclination: application to the Sichuan Basin.EXPLORATION GEOPHYSICS,15.
MLA Liu, Kang,et al."Modified reduction to the pole using the estimated total magnetisation direction and variable geomagnetic inclination: application to the Sichuan Basin".EXPLORATION GEOPHYSICS (2019):15.
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