Geomagnetic paleointensity and its geodynamic significance for the last 40 ka recorded in the northwestern sub-sea basin of the South China Sea

doi:10.6038/cjg2020N0353

IEECAS OpenIR > 古环境研究室

	Geomagnetic paleointensity and its geodynamic significance for the last 40 ka recorded in the northwestern sub-sea basin of the South China Sea
	Wang HaoSen 1; Xu Xing 2; Liu QingSong 1; Zhong Yi 1,5; Chen Ting 1; Qiang XiaoKe3 ; Chou YuMin 1; Yang XiaoQiang 4
通讯作者	Liu QingSong(qsliu@sustech.edu.cn)
	2020-07-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
卷号	63 期号:7 页码:2671-2681
摘要	Marine sediments can record relatively continuous paleomagnetic information. Normalized natural remanent magnetization (NRM) records of sediments can be used to construct continuous relative paleointensity (RPI) information of the paleomagnetic field, which facilitates studying evolution of the geomagnetic field and global record correlations. This paper investigated the gravity core L07 drilled from the northwestern sub-sea basin of the South China Sea. By using isothermal remanent magnetization (IRM) as the normalization parameter, RPI curve was constructed for the past 37 ka. Results show that the dominant magnetic minerals in the L07 are mainly (pseudo) single domain (PSD/SD) magnetite particles. In addition, RPI value maximized at 11. 5 ka. By further combining the RPI records of the Okhotsk sea core in East Asia and the abundance changes of Be-10 in China Loess, we attribute the RPI peak to the Earth's non-dipole field. Our results indicate that the influence of positive magnetic anomalies in East Asia can reach to low latitude area such as the South China Sea. This greatly improves our understanding the evolution of magnetic fields in East Asia and provides a possible mechanism for change in the millennium scale's RPI characteristics in this region.
关键词	Northwestern sub-sea basin of the South China Sea Relative paleointensity Non-dipole field Geodynamics East Asian positive magnetic anomaly
DOI	10.6038/cjg2020N0353
关键词[WOS]	NON-DIPOLE ; FIELD ; KYR ; INTENSITY ; REVERSAL ; ATLANTIC ; BE-10 ; MAP
收录类别	SCI ; SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000550583600014
出版者	SCIENCE PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15090
专题	古环境研究室
通讯作者	Liu QingSong
作者单位	1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Ctr Marine Magnetism CM2, Shenzhen 518055, Peoples R China 2.Guangzhou Marine Geol Survey, Guangzhou 510760, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 4.Sun Yat Sen Univ, Dept Earth Sci, Guangzhou 510275, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang HaoSen,Xu Xing,Liu QingSong,et al. Geomagnetic paleointensity and its geodynamic significance for the last 40 ka recorded in the northwestern sub-sea basin of the South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(7):2671-2681.
APA	Wang HaoSen.,Xu Xing.,Liu QingSong.,Zhong Yi.,Chen Ting.,...&Yang XiaoQiang.(2020).Geomagnetic paleointensity and its geodynamic significance for the last 40 ka recorded in the northwestern sub-sea basin of the South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(7),2671-2681.
MLA	Wang HaoSen,et al."Geomagnetic paleointensity and its geodynamic significance for the last 40 ka recorded in the northwestern sub-sea basin of the South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.7(2020):2671-2681.