Geomagnetic Field Paleointensity Spanning the Past 11 Myr From Marine Magnetic Anomalies in the Southern Hemisphere

Li, Yuanjie1,2; Liu, Jiabo1; Liu, Qingsong1,3,4

2021-06-16

10.1029/2021GL093235

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

Global variations in geomagnetic intensity can provide dating markers for sedimentary records, which is particularly helpful in precisely reconstructing climate changes. However, there are few continuous relative paleointensity (RPI) records derived from sediments spanning the past 11 Myr, and those that exist generally bear a high degree of uncertainty. Therefore, independent evidence from other continuous paleointensity records is needed to verify the existing information. Here, we analyzed magnetic anomaly profiles from the East Pacific Rise and the Southeast Indian Ridge and discovered correlative tiny wiggles in the stacked profiles from three different areas. A comparison with a previous magnetic study on the South Atlantic Ridge and the synthetic profile from RPI records generated for the past similar to 8 Myr confirmed that the small wavelength anomalies result from global geomagnetic intensity fluctuations. The newly calibrated timescales from selected marine magnetic anomalies could provide a potential dating reference for sedimentary strata.

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[41704068,41874078,"U1606401"] ; National Key Research & Development Program of China[2016YFA061903] ; Shenzhen Science and Technology Program[KQTD20170810111725321]

Geology

Geosciences, Multidisciplinary

WOS:000663558600009

AMER GEOPHYSICAL UNION

20212410504711

Climate change ; Microwave measurement ; Sedimentology

Atmospheric Properties:443.1 ; Geology:481.1 ; Earth Magnetism and Terrestrial Electricity:481.3.2 ; Electric Variables Measurements:942.2

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Ctr Marine Magnetism CM2, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China
3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Geol, Qingdao, Peoples R China
4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China

Li, Yuanjie,Liu, Jiabo,Liu, Qingsong. Geomagnetic Field Paleointensity Spanning the Past 11 Myr From Marine Magnetic Anomalies in the Southern Hemisphere[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(11).

Li, Yuanjie,Liu, Jiabo,&Liu, Qingsong.(2021).Geomagnetic Field Paleointensity Spanning the Past 11 Myr From Marine Magnetic Anomalies in the Southern Hemisphere.GEOPHYSICAL RESEARCH LETTERS,48(11).

Li, Yuanjie,et al."Geomagnetic Field Paleointensity Spanning the Past 11 Myr From Marine Magnetic Anomalies in the Southern Hemisphere".GEOPHYSICAL RESEARCH LETTERS 48.11(2021).