Evolution of silicate weathering in South China since 30 Ma: Controlling factors and global implications

doi:10.1016/j.gloplacha.2023.104095

IOCAS-IR > 海洋地质与环境重点实验室

	Evolution of silicate weathering in South China since 30 Ma: Controlling factors and global implications
	Jin, Hualong 1,3; Wan, Shiming 1,2,4; Liu, Chang 5; Zhao, Debo 1; Pei, Wenqiang 1; Yu, Zhaojie 1; Zhang, Jin 1; Song, Zehua1 ; Li, Mengjun1 ; Tang, Yi1 ; Li, Anchun 1
	2023-04-01
发表期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
卷号	223 页码:14
通讯作者	Wan, Shiming(wanshiming@ms.qdio.ac.cn)
摘要	Silicate weathering plays a significant role in regulating the carbon cycle and global climate by consuming at-mospheric CO2 over geological timescales. However, the importance of this mechanism in relation to paleo-climate changes remains controversial. A major obstacle to progress is the lack of comprehensive and detailed silicate weathering records preceding the Neogene. Here, we present a long-term and continuous record of major and trace elemental compositions of clay-sized (<2 mu m) siliciclastic sediment fractions from the International Ocean Discovery Program (IODP) Site U1501 in the northern South China Sea to reconstruct the evolutionary history of silicate weathering since 30 Ma and assess its links to tectonic/climate changes. The weathering proxies of the chemical index of alteration (CIA) and K/Al ratio indicate that the silicate weathering intensity of these sediments has had a decreasing trend over the past 30 Myr, which is coupled with paleoclimate proxies, deep-sea 818O values and black carbon 813C values, suggesting that global cooling and regional drying are the main driving factors for weathering intensity evolution. Furthermore, this study also provides reconstructions of the silicate weathering fluxes since the early Oligocene, highlighting that the CO2 consumption fluxes caused by silicate weathering have been mainly controlled by physical erosion fluxes rather than by chemical weathering intensity over geological timescales. Consequently, our findings indicate that with increased physical erosion flux and resultant elevated silicate weathering flux, carbon output modulates the carbon cycle, contributing to global cooling and ice sheet development through enhanced CO2 consumption.
关键词	Element geochemistry Silicate weathering Carbon cycle Global cooling South China Sea International Ocean Discovery Program
DOI	10.1016/j.gloplacha.2023.104095
收录类别	SCI
语种	英语
资助项目	National Key Research and Develop- ment Program of China[2022YFF0800503] ; National Natural Sci- ence Foundation of China[42125602] ; National Natural Sci- ence Foundation of China[42076052] ; Strategic Priority Research Program of Chinese Academy Sciences[XDB40010100] ; Innovation Project of QNLM[LSKJ202204205] ; Innovation Project of QNLM[2022QNLM050203] ; Taishan and Aoshan Talents Program[2017ASTCP-ES01]
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000994963600001
出版者	ELSEVIER
WOS关键词	ATMOSPHERIC CARBON-DIOXIDE ; SUMMER MONSOON EVOLUTION ; ASIAN MONSOON ; ORGANIC-CARBON ; SEA-LEVEL ; EROSION ; CLIMATE ; RATES ; SEDIMENTS ; RECORDS
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.qdio.ac.cn/handle/337002/183160
专题	海洋地质与环境重点实验室
通讯作者	Wan, Shiming
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 5.Texas A&M Univ, Int Ocean Discovery Program, College Stn, TX 77845 USA
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Jin, Hualong,Wan, Shiming,Liu, Chang,et al. Evolution of silicate weathering in South China since 30 Ma: Controlling factors and global implications[J]. GLOBAL AND PLANETARY CHANGE,2023,223:14.
APA	Jin, Hualong.,Wan, Shiming.,Liu, Chang.,Zhao, Debo.,Pei, Wenqiang.,...&Li, Anchun.(2023).Evolution of silicate weathering in South China since 30 Ma: Controlling factors and global implications.GLOBAL AND PLANETARY CHANGE,223,14.
MLA	Jin, Hualong,et al."Evolution of silicate weathering in South China since 30 Ma: Controlling factors and global implications".GLOBAL AND PLANETARY CHANGE 223(2023):14.