Chronostratigraphic framework of the East China Sea since MIS 6 from geomagnetic paleointensity and environmental magnetic records

Jiang, Zhaoxia1,2; Jin, Chunsheng3,4; Wang, Zhongbo5; Liu, Qingsong2,6; Li, Sanzhong1,2; Yao, Zhengquan2,7

2020

10.1016/j.gloplacha.2019.103092

GLOBAL AND PLANETARY CHANGE   影响因子和分区

0921-8181

1872-6364

Continental shelf is a globally important reservoir for terrigenous sediments, and provides sediment transportation pathways that extend from the shoreline to abyssal basins. Due to the strong land-sea interaction in response to frequent sea level change during the late Quaternary and methods' constraint, it is a big challenge to establish a reliable chronostratigraphy on the continental margin with terrigenous sediments dominance. Relative geomagnetic paleointensity (RPI) is quite useful for high-resolution chronostratigraphy in Brunhes epoch. In this study, relative paleointensity record for a sediment core (SFK-1, 82.9 m) from the outer East China Sea (ECS) shelf was studied. Rock magnetic results show that coarse vortex state magnetite is the dominant magnetic carrier throughout the core and that these sediments generally meet the accepted criteria for constructing relative paleointensity (RPI) record. RPI was established by normalizing the natural remanent magnetization (NRM) with isothermal remanent magnetization (IRM), both after 30 mT alternating demagnetization. Further, our RPI record was correlated with PISO-1500 and 7 age tie points were obtained. An age model is established for SFK-1 core with a basal age of 165 ka by combining the radiocarbon dates, relative geomagnetic paleointensity, and tandem correlation of environmental magnetic parameters to foraminiferal stable oxygen isotopes, which provides a reliable chronological framework for the later paleoenvironmental studies of ECS. The consistency of RPI record of SFK-1 and other worldwide observations suggest that global-scale pattern of geomagnetic paleointensity behavior is also documented in the sediments of the East China Sea, and the RPI of SFK-1 can be used as a reference curve for the RPI studies of other cores of ECS area, and even the whole west Pacific margin seas.
© 2019

East China Sea Relative paleointensity Sea level Environmental magnetism Glacial/interglacial stage

SCI ; EI

英语

其他

Fundamental Research Funds for the Central Universities[] ; National Natural Science Foundation of China[41876059] ; National Natural Science Foundation of China[41922026] ; National Natural Science Foundation of China[91858108] ; China Geological Survey[GZH201400201]

Physical Geography ; Geology

Geography, Physical ; Geosciences, Multidisciplinary

WOS:000510315900006

Elsevier B.V.

20200207994179

Demagnetization ; Geomagnetism ; Lithology ; Magnetite ; Magnetization ; Sea level

Oceanography, General:471.1 ; Geology:481.1 ; Earth Magnetism and Terrestrial Electricity:481.3.2 ; Soil Mechanics and Foundations:483 ; Magnetism: Basic Concepts and Phenomena:701.2

GEOSCIENCES

Web of Science

1.Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Institute for Advance Ocean Study, College of Marine Geosciences, Ocean University of China, Qingdao; 266100, China
2.Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266061, China
3.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing; 100029, China
4.Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing; 100101, China
5.Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao; 266071, China
6.Southern University of Science and Technology of China, Shenzhen; 518055, China
7.First Institute of Oceanography, Ministry of Natural Resources, Qingdao; 266061, China

Jiang, Zhaoxia,Jin, Chunsheng,Wang, Zhongbo,et al. Chronostratigraphic framework of the East China Sea since MIS 6 from geomagnetic paleointensity and environmental magnetic records[J]. GLOBAL AND PLANETARY CHANGE,2020,185.

Jiang, Zhaoxia,Jin, Chunsheng,Wang, Zhongbo,Liu, Qingsong,Li, Sanzhong,&Yao, Zhengquan.(2020).Chronostratigraphic framework of the East China Sea since MIS 6 from geomagnetic paleointensity and environmental magnetic records.GLOBAL AND PLANETARY CHANGE,185.

Jiang, Zhaoxia,et al."Chronostratigraphic framework of the East China Sea since MIS 6 from geomagnetic paleointensity and environmental magnetic records".GLOBAL AND PLANETARY CHANGE 185(2020).