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

文献类型：期刊论文

作者Jin, Hualong4,5; Wan, Shiming1,3,5; Liu, Chang2; Zhao, Debo5; Pei, Wenqiang5; Yu, Zhaojie5; Zhang, Jin5; Song, Zehua5; Li, Mengjun5; Tang, Yi5
刊名GLOBAL AND PLANETARY CHANGE
出版日期2023-04-01
卷号223页码:14
关键词Element geochemistry Silicate weathering Carbon cycle Global cooling South China Sea International Ocean Discovery Program
ISSN号0921-8181
DOI10.1016/j.gloplacha.2023.104095
通讯作者Wan, Shiming(wanshiming@ms.qdio.ac.cn)
英文摘要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.
WOS关键词ATMOSPHERIC CARBON-DIOXIDE ; SUMMER MONSOON EVOLUTION ; ASIAN MONSOON ; ORGANIC-CARBON ; SEA-LEVEL ; EROSION ; CLIMATE ; RATES ; SEDIMENTS ; RECORDS
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
语种英语
WOS记录号WOS:000994963600001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/183159]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Wan, Shiming
作者单位1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
2.Texas A&M Univ, Int Ocean Discovery Program, College Stn, TX 77845 USA
3.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
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.

入库方式： OAI收割

来源：海洋研究所

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