| Tectonic and climatic controls on long-term silicate weathering in Asia since 5 Ma | |
Wan, Shiming1; Clift, Peter D.2; Li, Anchun1; Yu, Zhaojie1; Li, Tiegang1 ; Hu, Dengke3; Wan, SM (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China.
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| 2012-08-15 | |
| 发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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| ISSN | 0094-8276 |
| 卷号 | 39页码:L15611 |
| 文章类型 | Article |
| 摘要 | Determining the interplay between tectonic deformation, climate, atmospheric CO2 concentrations and continental weathering and erosion is key to understanding the mechanisms that forced Cenozoic global cooling. In contrast with studies of paleo-climate and pCO(2), the history of long-term silicate weathering in the Himalaya and Tibetan Plateau (HTP) during the late Cenozoic remains unclear. We reconstruct 5 m.y. of silicate sedimentary records at Ocean Drilling Program (ODP) Site 1143 in the South China Sea to explore the weathering history of the Mekong River basin that supplied the sediment. Coherent variation of weathering proxies from the South China Sea, Bay of Bengal, Loess Plateau, as well as the Yangtze and Yellow Rivers, indicates weakening chemical weathering intensity since the late Pliocene, as the climate cooled. This cooling, coupled with tectonic activity, shifted the dominant weathering regime from more transport-limited to more weathering-limited, causing less chemical depletion of silicate minerals. While silicate weathering rates became strongly correlated to erosion rates, they were decoupled from chemical weathering intensity. Physical denudation and associated silicate weathering rates in the HTP area increased in the Pliocene, driven by both rock uplift and stronger monsoon precipitation, decreasing atmospheric CO2 concentrations, and so contributing to Northern Hemisphere Glaciation (NHG). Citation: Wan, S., P. D. Clift, A. Li, Z. Yu, T. Li, and D. Hu (2012), Tectonic and climatic controls on long-term silicate weathering in Asia since 5 Ma, Geophys. Res. Lett., 39, L15611, doi:10.1029/2012GL052377. |
| 关键词 | South China Sea Summer Monsoon Erosion Rates History Record Evolution Sediment Feedback Cycle |
| 学科领域 | Geosciences, Multidisciplinary |
| DOI | 10.1029/2012GL052377 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307742200003 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/12518 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Wan, SM (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA 3.Univ Aberdeen, Sch Geosci, Aberdeen, Scotland |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Wan, Shiming,Clift, Peter D.,Li, Anchun,et al. Tectonic and climatic controls on long-term silicate weathering in Asia since 5 Ma[J]. GEOPHYSICAL RESEARCH LETTERS,2012,39:L15611. |
| APA | Wan, Shiming.,Clift, Peter D..,Li, Anchun.,Yu, Zhaojie.,Li, Tiegang.,...&Wan, SM .(2012).Tectonic and climatic controls on long-term silicate weathering in Asia since 5 Ma.GEOPHYSICAL RESEARCH LETTERS,39,L15611. |
| MLA | Wan, Shiming,et al."Tectonic and climatic controls on long-term silicate weathering in Asia since 5 Ma".GEOPHYSICAL RESEARCH LETTERS 39(2012):L15611. |
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