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Depth of Martian Magnetization From Localized Power Spectrum Analysis
Gong, Shengxia1,2; Wieczorek, Mark2
2021-08-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
ISSN2169-9097
Volume126Issue:8Pages:14
AbstractMagnetic field measurements show that Mars possesses strong crustal magnetic anomalies that formed when the planet had an active dynamo. To investigate the origin of this magnetization, we used localized power spectrum analyses to constrain the equivalent depths of thin magnetic layers in the crust. Using a new martian magnetic field model that incorporates data from both the Mars Atmosphere and Volatile EvolutioN and Mars Global Surveyor missions, we found that the equivalent magnetization depths on Mars vary from the surface to 72 km. In the northern hemisphere the magnetization depths are found to be on average 9 km, whereas in the southern hemisphere the depths are on average 32 km. If these depths are interpreted in terms of a thick magnetic layer, magnetization in the northern lowlands could extend from the surface to about 18 km depth, whereas for the southern highlands the magnetic layer could extend from about 20 km depth to the base of the crust. The strongest magnetic anomalies are, in general, associated with deep source depths. Our results are consistent with the hypothesis where strong primordial magnetic materials of the northern hemisphere were excavated from the Borealis impact basin, leaving only strong deep remanent magnetization in the southern hemisphere.
KeywordMars crustal magnetic field power spectrum analysis depth of magnetization
Funding OrganizationB-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES)
DOI10.1029/2020JE006690
WOS KeywordMARS ; FIELD ; TOPOGRAPHY ; GEOPHYSICS ; IMPACTS ; ORIGIN ; SPHERE ; BASIN
Language英语
Funding ProjectB-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; National Natural Science Foundation of China[11803066] ; French Space Agency (CNES)
Funding OrganizationB-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; French Space Agency (CNES) ; French Space Agency (CNES)
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000691020700008
PublisherAMER GEOPHYSICAL UNION
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75268
Collection中国科学院国家天文台
Corresponding AuthorGong, Shengxia
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, CAS Key Lab Planetary Sci, Shanghai, Peoples R China
2.Univ Cote dAzur, Observ COte dAzur, CNRS, Lab Lagrange, Nice, France
Recommended Citation
GB/T 7714
Gong, Shengxia,Wieczorek, Mark. Depth of Martian Magnetization From Localized Power Spectrum Analysis[J]. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,2021,126(8):14.
APA Gong, Shengxia,&Wieczorek, Mark.(2021).Depth of Martian Magnetization From Localized Power Spectrum Analysis.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,126(8),14.
MLA Gong, Shengxia,et al."Depth of Martian Magnetization From Localized Power Spectrum Analysis".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 126.8(2021):14.
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