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

doi:10.3389/feart.2021.770236

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 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 6,7; Hu, Bangqi 5,6; Zhao, Jingtao 5; Liu, Xiting 4; Cui, Ruyong 5; Ding, Xue 3,5; Wang, Guifeng 2; Huang, Jianping 1
刊名	FRONTIERS IN EARTH SCIENCE
	2022-01-21
卷号	9 页码:10
关键词	geochemistry riverine sediment weathering Hainan Island South China Sea
DOI	10.3389/feart.2021.770236
通讯作者	Hu, Bangqi(bangqihu@gmail.com)
英文摘要	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).
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关键词	RARE-EARTH-ELEMENT ; CLAY MINERALOGY ; MEKONG RIVER ; TIME-SCALE ; GEOCHEMISTRY ; TAIWAN ; PROVENANCE ; EROSION ; CONSTRAINTS ; DENUDATION
WOS研究方向	Geology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000751840900001
资助机构	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
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/17430]
专题	地球环境研究所_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.China Univ Petr, Sch Geosci, Qingdao, Peoples R China 2.Marine Geol Inst Hainan Prov, Haikou, Hainan, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 4.Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Technol, Qingdao, Peoples R China 5.Minist Nat Resources, Qingdao Inst Marine Geol, Qingdao, Peoples R China 6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 7.Hainan Univ, Coll Marine Sci, Haikou, Hainan, 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.