Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage
Seamounts are ubiquitous topographic units in the global ocean, and their effects on local circulation have attracted great research attention in physical oceanography; however, fewer relevant efforts were made on geological timescales in previous studies. The Caiwei (Pako) Guyot in the Magellan Sea...
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MDPI AG
2021-02-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/9/3/253 |
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| author | Liang Yi Haifeng Wang Xiguang Deng Haifan Yuan Dong Xu Huiqiang Yao |
| author_facet | Liang Yi Haifeng Wang Xiguang Deng Haifan Yuan Dong Xu Huiqiang Yao |
| author_sort | Liang Yi |
| collection | DOAJ |
| description | Seamounts are ubiquitous topographic units in the global ocean, and their effects on local circulation have attracted great research attention in physical oceanography; however, fewer relevant efforts were made on geological timescales in previous studies. The Caiwei (Pako) Guyot in the Magellan Seamounts of the western Pacific is a typical seamount and oceanographic characteristics have been well documented. In this study, we investigate a sediment core by geochronological and geochemical studies to reveal a topography-induce surface-to-bottom linkage. The principal results are as follows: (1) Two magnetozones are recognized in core MABC–11, which can be correlated to the Brunhes and Matuyama chrons; (2) Elements Ca, Si, Cl, K, Mn, Ti, and Fe are seven elements with high intensities by geochemical scanning; (3) Ca intensity can be tuned to global ice volume to refine the age model on glacial-interglacial timescales; (4) The averaged sediment accumulation rate is ~0.73 mm/kyr, agreeing with the estimate of the excess <sup>230</sup>Th data in the upper part. Based on these results, a proxy of element Mn is derived, whose variability can be correlated with changes in global ice volume and deep-water masses on glacial-interglacial timescales. This record is also characterized by an evident 23-kyr cycle, highlighting a direct influence of solar insolation on deep-sea sedimentary processes. Overall, sedimentary archives of the Caiwei Guyot not only record an intensified abyssal ventilation during interglaciations in the western Pacific, but also provide a unique window for investigating the topography-induced linkage between the upper and bottom ocean on orbital timescales. |
| first_indexed | 2024-03-09T06:21:11Z |
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| language | English |
| last_indexed | 2024-03-09T06:21:11Z |
| publishDate | 2021-02-01 |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-c0f42f4c79884b4698e87d9c664cfbe22023-12-03T11:48:37ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-02-019325310.3390/jmse9030253Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep LinkageLiang Yi0Haifeng Wang1Xiguang Deng2Haifan Yuan3Dong Xu4Huiqiang Yao5State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, ChinaKey Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaKey Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaKey Laboratory of Muddy Coastal Geo-Environment, Tianjin Centre, China Geological Survey, Tianjin 300170, ChinaKey Laboratory of Submarine Geosciences, MNR, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, ChinaKey Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, ChinaSeamounts are ubiquitous topographic units in the global ocean, and their effects on local circulation have attracted great research attention in physical oceanography; however, fewer relevant efforts were made on geological timescales in previous studies. The Caiwei (Pako) Guyot in the Magellan Seamounts of the western Pacific is a typical seamount and oceanographic characteristics have been well documented. In this study, we investigate a sediment core by geochronological and geochemical studies to reveal a topography-induce surface-to-bottom linkage. The principal results are as follows: (1) Two magnetozones are recognized in core MABC–11, which can be correlated to the Brunhes and Matuyama chrons; (2) Elements Ca, Si, Cl, K, Mn, Ti, and Fe are seven elements with high intensities by geochemical scanning; (3) Ca intensity can be tuned to global ice volume to refine the age model on glacial-interglacial timescales; (4) The averaged sediment accumulation rate is ~0.73 mm/kyr, agreeing with the estimate of the excess <sup>230</sup>Th data in the upper part. Based on these results, a proxy of element Mn is derived, whose variability can be correlated with changes in global ice volume and deep-water masses on glacial-interglacial timescales. This record is also characterized by an evident 23-kyr cycle, highlighting a direct influence of solar insolation on deep-sea sedimentary processes. Overall, sedimentary archives of the Caiwei Guyot not only record an intensified abyssal ventilation during interglaciations in the western Pacific, but also provide a unique window for investigating the topography-induced linkage between the upper and bottom ocean on orbital timescales.https://www.mdpi.com/2077-1312/9/3/253magnetostratigraphygeochemical propertiesCaiwei (Pako) Guyotmiddle Pleistocenedeep-sea ventilationsurface-to-deep linkage |
| spellingShingle | Liang Yi Haifeng Wang Xiguang Deng Haifan Yuan Dong Xu Huiqiang Yao Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage Journal of Marine Science and Engineering magnetostratigraphy geochemical properties Caiwei (Pako) Guyot middle Pleistocene deep-sea ventilation surface-to-deep linkage |
| title | Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage |
| title_full | Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage |
| title_fullStr | Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage |
| title_full_unstemmed | Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage |
| title_short | Geochronology and Geochemical Properties of Mid-Pleistocene Sediments on the Caiwei Guyot in the Northwest Pacific Imply a Surface-to-Deep Linkage |
| title_sort | geochronology and geochemical properties of mid pleistocene sediments on the caiwei guyot in the northwest pacific imply a surface to deep linkage |
| topic | magnetostratigraphy geochemical properties Caiwei (Pako) Guyot middle Pleistocene deep-sea ventilation surface-to-deep linkage |
| url | https://www.mdpi.com/2077-1312/9/3/253 |
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