Sediment distribution and dispersal in the southern South China Sea: Evidence from clay minerals and magnetic properties

doi:10.1016/j.margeo.2021.106560

IOCAS-IR > 海洋地质与环境重点实验室

	Sediment distribution and dispersal in the southern South China Sea: Evidence from clay minerals and magnetic properties
	Huang, Jie 1,2,3; Jiao, Wenjun 1; Liu, Jianxing 4; Wan, Shiming 1; Xiong, Zhifang 4; Zhang, Jin 1; Yang, Zaibao 1; Li, Anchun 1; Li, Tiegang4
	2021-09-01
发表期刊	MARINE GEOLOGY
ISSN	0025-3227
卷号	439 页码:10
通讯作者	Huang, Jie(huangjie@qdio.ac.cn)
摘要	Modern source-to-sink processes in the southern South China Sea (SCS) remain poorly understood. In this study, clay minerals and magnetic properties are used to identify the sources and transport pathways of surface sediments in the southern SCS. The distributions of four clay mineral species in the deep southern SCS are mainly controlled by sediment sources, while clay minerals on the outer Sunda Shelf mostly reflect reworking/recycling of older weathered sediments. Clay mineral analyses indicate that the Mekong River is the predominant contributor of clay minerals to the southern SCS, with minor contributions from Luzon and/or Palawan and northern Borneo. The contribution from the Luzon and/or Palawan arc to the southern SCS is semi-quantitatively evaluated as 20% and is mainly smectite. Most sediments in the southern SCS are magnetically dominated by mixtures of magnetite, hematite and goethite in variable proportions. Concentration-dependent magnetic parameters decrease gradually seaward and then sharply towards the outer deep sea. The grain size of magnetite particles also shows a significant fining trend with distance from the southwestern sources. In addition, the magnetic minerals change from hematite- and goethite-dominated to magnetite-dominated type as going further offshore. These magnetic characteristics suggest that the magnetic minerals in the southern SCS are mainly sourced from the southwest through summer monsoon-driven surface currents. Finally, combining the provenance signature indicated by clay minerals and the transport information revealed by magnetic properties, this study highlights that the Mekong River plays a major role in modern source-to-sink processes in the southern SCS. In brief, our study sets a good example for tracing sediment provenance and transport in other marginal seas worldwide.
关键词	Clay minerals Magnetic properties Sediment provenance Transport Southern South China Sea
DOI	10.1016/j.margeo.2021.106560
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Shandong Province[ZR2020MD067] ; Basic Scientific Fund for National Public Research Institutes of China[2019S04] ; Basic Scientific Fund for National Public Research Institutes of China[2017Y07] ; [GASI-04-QYQH-04]
WOS研究方向	Geology ; Oceanography
WOS类目	Geosciences, Multidisciplinary ; Oceanography
WOS记录号	WOS:000680656200010
出版者	ELSEVIER
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/175954
专题	海洋地质与环境重点实验室
通讯作者	Huang, Jie
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.First Inst Oceanog, Key Lab Marine Geol & Metallogeny, Minist Nat Resources, Qingdao 266061, Peoples R China
第一作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
通讯作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Huang, Jie,Jiao, Wenjun,Liu, Jianxing,et al. Sediment distribution and dispersal in the southern South China Sea: Evidence from clay minerals and magnetic properties[J]. MARINE GEOLOGY,2021,439:10.
APA	Huang, Jie.,Jiao, Wenjun.,Liu, Jianxing.,Wan, Shiming.,Xiong, Zhifang.,...&Li, Tiegang.(2021).Sediment distribution and dispersal in the southern South China Sea: Evidence from clay minerals and magnetic properties.MARINE GEOLOGY,439,10.
MLA	Huang, Jie,et al."Sediment distribution and dispersal in the southern South China Sea: Evidence from clay minerals and magnetic properties".MARINE GEOLOGY 439(2021):10.

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