Topographic and Climatic Control on Chemical Weathering of Mountainous Riverine Sediments of Hainan Island, South China Sea

doi:10.3389/feart.2021.770236

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Topographic and Climatic Control on Chemical Weathering of Mountainous Riverine Sediments of Hainan Island, South China Sea
	Xu, Fangjian 1,2; Hu, Bangqi 2,3; Zhao, Jingtao 3; Liu, Xiting 4; Cui, Ruyong 3; Ding, Xue 3,5; Wang, Guifeng 6; Huang, Jianping 7
通讯作者	Hu, Bangqi(bangqihu@gmail.com)
	2022-01-21
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	9 页码:10
摘要	Hainan Island, the largest island in the northwestern South China Sea (SCS), is characterized by many tropical mountainous rivers that flow into the SCS. The geochemistry of these riverine sediments and the factors controlling the weathering intensity are still not well understood. In this study, sedimentary geochemistry has been investigated by using 45 riverine sediments collected from 18 major rivers on Hainan Island. The Hainan riverine sediments are only first-cycle rather than polycyclic sediments, and they faithfully reflect the present weathering intensity. The high and steady values of the Chemical Index of Alteration (CIA) indicate that the riverine sediments at different parts of the Hainan Island have overall undergone intensive chemical weathering. The low values of Weathering Index of Parker (WIP) and high alpha(Ca) , alpha(K), alpha(Sr), and alpha(Ba) values of north Hainan indicate the highest weathering degree, which is mainly influenced by the flat topography. The values of alpha(Na) , alpha(K), alpha(Sr), and alpha(Ba) of southwest Hainan which are higher than those of east Hainan suggest that the leaching of elements such as Na, K, Sr, and Ba is more extreme (i.e., more intensive weathering). These are mainly caused by the different physical denudation due to different summer precipitation. Overall, the Hainan Island is featured by intensive chemical weathering and is classified as a typical transport-limited weathering regime. Therefore, the geochemistry of the riverine sediments of the Hainan Island is different from that of sediments in tectonically active regions (e.g., Taiwan Island).
关键词	geochemistry riverine sediment weathering Hainan Island South China Sea
DOI	10.3389/feart.2021.770236
关键词[WOS]	RARE-EARTH-ELEMENT ; CLAY MINERALOGY ; MEKONG RIVER ; TIME-SCALE ; GEOCHEMISTRY ; TAIWAN ; PROVENANCE ; EROSION ; CONSTRAINTS ; DENUDATION
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41976192] ; Project of the China Geological Survey[DD20191010] ; Shandong Provincial Natural Science Foundation of China[ZR2020MD061] ; Shandong Provincial Natural Science Foundation of China[ZR202103010094] ; Open Foundation of the State Key Laboratory of Loess and Quaternary Geology[SKLLQG1707] ; Open Foundation of the State Key Laboratory of Loess and Quaternary Geology[SKLLQG 1805] ; National Key Research and Development Program of China[2018YFC0310001] ; Independent Project of Hainan Key Laboratory of Marine Geological Resources and Environment[2019256 (2020) HNHSKC-01] ; Independent Project of Hainan Key Laboratory of Marine Geological Resources and Environment[2019256-01]
WOS研究方向	Geology
项目资助者	National Natural Science Foundation of China ; Project of the China Geological Survey ; Shandong Provincial Natural Science Foundation of China ; Open Foundation of the State Key Laboratory of Loess and Quaternary Geology ; National Key Research and Development Program of China ; Independent Project of Hainan Key Laboratory of Marine Geological Resources and Environment
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000751840900001
出版者	FRONTIERS MEDIA SA
引用统计	被引频次：2[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/361006/17431
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Hu, Bangqi
作者单位	1.Hainan Univ, Coll Marine Sci, Haikou, Hainan, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Minist Nat Resources, Qingdao Inst Marine Geol, Qingdao, Peoples R China 4.Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Technol, Qingdao, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 6.Marine Geol Inst Hainan Prov, Haikou, Hainan, Peoples R China 7.China Univ Petr, Sch Geosci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Xu, Fangjian,Hu, Bangqi,Zhao, Jingtao,et al. Topographic and Climatic Control on Chemical Weathering of Mountainous Riverine Sediments of Hainan Island, South China Sea[J]. FRONTIERS IN EARTH SCIENCE,2022,9:10.
APA	Xu, Fangjian.,Hu, Bangqi.,Zhao, Jingtao.,Liu, Xiting.,Cui, Ruyong.,...&Huang, Jianping.(2022).Topographic and Climatic Control on Chemical Weathering of Mountainous Riverine Sediments of Hainan Island, South China Sea.FRONTIERS IN EARTH SCIENCE,9,10.
MLA	Xu, Fangjian,et al."Topographic and Climatic Control on Chemical Weathering of Mountainous Riverine Sediments of Hainan Island, South China Sea".FRONTIERS IN EARTH SCIENCE 9(2022):10.