| Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 | |
Wang, Wei1,6; Colin, Christophe2; Xu, Zhaokai1,3,4,5; Lim, Dhongil7; Wan, Shiming1,3,5; Li, Tiegang8
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| 2022-10-01 | |
| 发表期刊 | GLOBAL AND PLANETARY CHANGE
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| ISSN | 0921-8181 |
| 卷号 | 217页码:18 |
| 通讯作者 | Xu, Zhaokai(zhaokaixu@qdio.ac.cn) ; Li, Tiegang(tgli@fio.org.cn) |
| 摘要 | The Eocene was a critical period of global plate reorganization and it also saw the Earth's climate transition from the warmhouse state to the coolhouse state. Reconstructing the Eocene sedimentary history in the climate -sensitive Southern Ocean is important for understanding paleoenvironmental changes in response to the accel-erated Australia/Antarctica separation and global cooling throughout the middle and late Eocene. Here, we present the first detailed multiproxy record of a continuous sequence from International Ocean Discovery Pro-gram (IODP) Site U1514 in the Mentelle Basin off southwestern Australia. Our aim is to reconstruct the sediment provenances and paleoenvironmental evolution in response to the abovementioned climatic and tectonic changes in the mid-high southern latitudes during the Eocene. Provenance analyses based on Sr-Nd isotopes, trace ele-ments, and clay mineral assemblages suggest that Eocene sediments at Site U1514 predominantly originated from the southwestern Australian continent and the Naturaliste Plateau. Sediment provenance variations during the middle Eocene indicate that the onset of fast separation between Australia and Antarctica at 43 Ma caused an increased supply of volcanic materials from the Naturaliste Plateau between 43 and 38 Ma. Terrigenous inputs to the Mentelle Basin during the middle Eocene were primarily controlled by paleoclimate changes rather than tectonic processes because coeval clay mineralogical changes (higher kaolinite/smectite ratio and MARkaolinite) indicate a period of stronger physical erosion and chemical weathering on the western Australian continent that resulted in increased terrigenous materials delivered to the Mentelle Basin. Our results reveal a 5 Myr-long (43-38 Ma) warming reversal in the southern mid-high latitudes, providing an exception to the generally short-lived (10-100 kyr-long) hyperthermals that interrupted the long-term global cooling throughout the middle to late Eocene. As for the late Eocene (38-37 Ma), tectonic processes related to the sudden acceleration in seafloor spreading in the Tasman Sea led to the exposure of shallower areas, resulting in rapid detritus accu-mulation at the study site. During the late Eocene (37-34 Ma), major sediment provenance shifted from distal source areas (e.g., the Yilgarn Craton) to relatively proximal sources (e.g., the Leeuwin Block and Perth Basin). We interpret that the regional uplift in southwestern Australia and coeval climate cooling resulted in the diversion and inactivation of large drainage systems, thus blocking the transportation of sediment from distant regions. |
| 关键词 | Eocene Paleoclimate Southern mid-high latitudes Sr and Nd isotopes Clay minerals Provenance |
| DOI | 10.1016/j.gloplacha.2022.103956 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2022QNLM050203] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40010100] ; National Natural Science Foundation of China[41876034] ; National Natural Science Foundation of China[41676038] ; National Natural Science Foundation of China[41376064] ; National Natural Science Foundation of China[41830539] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; Taishan Scholars Project Funding ; National Research Foundation of Korea - Korean government (MSIT)[2021R1A2C1014443] |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000890481400001 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/180278 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Xu, Zhaokai; Li, Tiegang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Univ Paris Saclay, CNRS, GEOPS, F-91405 Orsay, France 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Geol, Qingdao 266061, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 5.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Korea Inst Ocean Sci & Technol, Pusan 53201, South Korea 8.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Metallogeny, Qingdao 266061, Peoples R China |
| 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 | Wang, Wei,Colin, Christophe,Xu, Zhaokai,et al. Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514[J]. GLOBAL AND PLANETARY CHANGE,2022,217:18. |
| APA | Wang, Wei,Colin, Christophe,Xu, Zhaokai,Lim, Dhongil,Wan, Shiming,&Li, Tiegang.(2022).Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514.GLOBAL AND PLANETARY CHANGE,217,18. |
| MLA | Wang, Wei,et al."Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514".GLOBAL AND PLANETARY CHANGE 217(2022):18. |
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