Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514
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 paleoenvironmenta...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/180278 2024-04-28T07:57:46+00:00 Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 Wang, Wei Colin, Christophe Xu, Zhaokai Lim, Dhongil Wan, Shiming Li, Tiegang 2022-10-01 http://ir.qdio.ac.cn/handle/337002/180277 http://ir.qdio.ac.cn/handle/337002/180278 https://doi.org/10.1016/j.gloplacha.2022.103956 英语 eng ELSEVIER GLOBAL AND PLANETARY CHANGE http://ir.qdio.ac.cn/handle/337002/180277 http://ir.qdio.ac.cn/handle/337002/180278 doi:10.1016/j.gloplacha.2022.103956 Eocene Paleoclimate Southern mid-high latitudes Sr and Nd isotopes Clay minerals Provenance Physical Geography Geology Geography Physical Geosciences Multidisciplinary 期刊论文 2022 ftchinacasciocas https://doi.org/10.1016/j.gloplacha.2022.103956 2024-04-08T00:16:49Z 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 ... Report Antarc* Antarctica Southern Ocean Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Global and Planetary Change 217 103956 |
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Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Eocene Paleoclimate Southern mid-high latitudes Sr and Nd isotopes Clay minerals Provenance Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
spellingShingle |
Eocene Paleoclimate Southern mid-high latitudes Sr and Nd isotopes Clay minerals Provenance Physical Geography Geology Geography Physical Geosciences Multidisciplinary Wang, Wei Colin, Christophe Xu, Zhaokai Lim, Dhongil Wan, Shiming Li, Tiegang Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 |
topic_facet |
Eocene Paleoclimate Southern mid-high latitudes Sr and Nd isotopes Clay minerals Provenance Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
description |
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 ... |
format |
Report |
author |
Wang, Wei Colin, Christophe Xu, Zhaokai Lim, Dhongil Wan, Shiming Li, Tiegang |
author_facet |
Wang, Wei Colin, Christophe Xu, Zhaokai Lim, Dhongil Wan, Shiming Li, Tiegang |
author_sort |
Wang, Wei |
title |
Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 |
title_short |
Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 |
title_full |
Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 |
title_fullStr |
Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 |
title_full_unstemmed |
Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514 |
title_sort |
tectonic and climatic controls on sediment transport to the southeast indian ocean during the eocene: new insights from iodp site u1514 |
publisher |
ELSEVIER |
publishDate |
2022 |
url |
http://ir.qdio.ac.cn/handle/337002/180277 http://ir.qdio.ac.cn/handle/337002/180278 https://doi.org/10.1016/j.gloplacha.2022.103956 |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_relation |
GLOBAL AND PLANETARY CHANGE http://ir.qdio.ac.cn/handle/337002/180277 http://ir.qdio.ac.cn/handle/337002/180278 doi:10.1016/j.gloplacha.2022.103956 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2022.103956 |
container_title |
Global and Planetary Change |
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217 |
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103956 |
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1797590151187136512 |