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  2. 地质与地球物理研究所
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  4. 中国科学院油气资源研究重点实验室
Modified reduction to the pole using the estimated total magnetisation direction and variable geomagnetic inclination: application to the Sichuan Basin

文献类型：期刊论文

作者Liu, Kang3,4,5; Hao, Tianyao1,3,4,5; Wen, Baihong2; Yang, Hui2
刊名EXPLORATION GEOPHYSICS
出版日期2019-10-11
页码15
ISSN号0812-3985
关键词Magnetisation directions remanent magnetisation total magnetisation differential reduction to the pole gradient cross-correlation
DOI10.1080/08123985.2019.1639365
英文摘要Processing 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.
WOS关键词TO-THE-POLE ; DIFFERENTIAL REDUCTION ; GAS-FIELD ; REMANENT ; CHINA
资助项目Special 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]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者TAYLOR & FRANCIS LTD
WOS记录号WOS:000489737400001
资助机构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 ; 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
源URL[http://ir.iggcas.ac.cn/handle/132A11/93905]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Hao, Tianyao
作者单位1.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou, Zhejiang, Peoples R China
2.Res Inst Petr Explorat & Dev, Dept Petr Geophys, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Marine Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：地质与地球物理研究所

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