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, Hualong1,3; Wan, Shiming1,2,4; Liu, Chang5; Zhao, Debo1; Pei, Wenqiang1; Yu, Zhaojie1; Zhang, Jin1; Song, Zehua1; Li, Mengjun1; Tang, Yi1; Li, Anchun1
2023-04-01
Source PublicationGLOBAL AND PLANETARY CHANGE
ISSN0921-8181
Volume223Pages:14
Corresponding AuthorWan, Shiming(wanshiming@ms.qdio.ac.cn)
AbstractSilicate 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.
KeywordElement geochemistry Silicate weathering Carbon cycle Global cooling South China Sea International Ocean Discovery Program
DOI10.1016/j.gloplacha.2023.104095
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000994963600001
PublisherELSEVIER
WOS KeywordATMOSPHERIC CARBON-DIOXIDE ; SUMMER MONSOON EVOLUTION ; ASIAN MONSOON ; ORGANIC-CARBON ; SEA-LEVEL ; EROSION ; CLIMATE ; RATES ; SEDIMENTS ; RECORDS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/183160
Collection海洋地质与环境重点实验室
Corresponding AuthorWan, Shiming
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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