| 赤道东经90°海岭活塞柱状心钙同位素曲线特征及其古环境意义 |
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| 引用本文： | 王凤,方念乔,胡超涌,Sarah Goldsmith,徐勇航,丁旋,王爱军,陈萍,包锐.赤道东经90°海岭活塞柱状心钙同位素曲线特征及其古环境意义[J].海洋学报(英文版),2018,37(9):59-66. |
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| 作者姓名： | 王凤 方念乔 胡超涌 Sarah Goldsmith 徐勇航 丁旋 王爱军 陈萍 包锐 |
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| 作者单位： | 国家海洋局第三海洋研究所, 厦门, 361000,中国地质大学(北京)海洋学院, 北京, 100083,中国地质大学(武汉)地球科学学院, 武汉, 430074,Demo Laboratory, Ctd. MicroMass, Mantchestt M139PL, United Kingdom,国家海洋局第三海洋研究所, 厦门, 361000,中国地质大学(北京)海洋学院, 北京, 100083,国家海洋局第三海洋研究所, 厦门, 361000,安徽理工大学, 淮南, 232001,Laboratoire de Sciences du Climat et de l''Environnement, CNRS, Gif-Yvette, 75000, France |
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| 基金项目： | The National Programme on Global Change and Air-sea Interaction under contract Nos GASI-03-04-01-03 and GASI-GEOGE-03; the Research Grant of Third Institute of Oceanography, State Oceanic Administration under contract No. 2015015. |
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| 摘 要： | A δ~(44) Ca curve from shells of the planktonic foraminifera Globigerinoides sacculifer in calcareous biogenic oozes has been extracted from the Nintyeast Ridge in the Indian Ocean since 300 ka. By combining terrigenous inputs(e.g., grain size, magnetic susceptibility, and turbidite frequency) with the oceanic productivity(e.g., biogenic content and Neogloboquadrina dutertrei content), it is found that the curve's variations are closely related to the historical evolution of the oceanic calcium cycle. The δ~(44)Ca value is in lower tendency and has small oscillation during Marine Isotope Stage(MIS) 6, when the supply of terrigenous detrital is highest. In contrast, during MIS 3,5 and 7, the δ~(44) Ca values are in higher tendency, and their fluctuations are consistent with the variations of the productivity proxies. These results suggest that the calcium isotopes are mainly influenced by the input of the Himalayan erosion products to the northern Indian Ocean. In addition, the developmental stages of calcareous planktons may have a secondary impact on the fluctuations of the calcium isotope ratio of sea water.
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| 关 键 词： | 赤道东经90°海岭、钙同位素、古海洋学 |
| 收稿时间： | 2017/10/23 0:00:00 |
Paleoenvironmental implications of the calcium isotope characteristics in the MD81349 from the Nintyeast Ridge in the Indian Ocean |
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| WANG Feng,FANG Nianqiao,HU Chaoyong,GOLDSMITH Sarah,XU Yonghang,DING Xuan,WANG Aijun,CHEN Ping and BAO Rui.Paleoenvironmental implications of the calcium isotope characteristics in the MD81349 from the Nintyeast Ridge in the Indian Ocean[J].Acta Oceanologica Sinica,2018,37(9):59-66. |
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| Authors: | WANG Feng FANG Nianqiao HU Chaoyong GOLDSMITH Sarah XU Yonghang DING Xuan WANG Aijun CHEN Ping and BAO Rui |
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| Institution: | 1.Third Institute of Oceanography,State Oceanic Administration,Xiamen,China;2.Institute of Marine Geology and Geophysics,China University of Geosciences (Beijing),Beijing,China;3.School of Earth Sciences,China University of Geosciences,Wuhan,China;4.Demo Laboratory, Ctd. MicroMass,Mantchestt,UK;5.School of Earth Science Environmental Engineering,Anhui University of Science and Technology,Huainan,China;6.Climate and Environment Sciences Laboratory of the institute Pierre Simon Laplace (LSCE),Gif sur Yvette,France |
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| Abstract: | A δ44Ca curve from shells of the planktonic foraminifera Globigerinoides sacculifer in calcareous biogenic oozes has been extracted from the Nintyeast Ridge in the Indian Ocean since 300 ka. By combining terrigenous inputs (e.g., grain size, magnetic susceptibility, and turbidite frequency) with the oceanic productivity (e.g., biogenic content and Neogloboquadrina dutertrei content), it is found that the curve’s variations are closely related to the historical evolution of the oceanic calcium cycle. The δ44Ca value is in lower tendency and has small oscillation during Marine Isotope Stage (MIS) 6, when the supply of terrigenous detrital is highest. In contrast, during MIS 3, 5 and 7, the δ44Ca values are in higher tendency, and their fluctuations are consistent with the variations of the productivity proxies. These results suggest that the calcium isotopes are mainly influenced by the input of the Himalayan erosion products to the northern Indian Ocean. In addition, the developmental stages of calcareous planktons may have a secondary impact on the fluctuations of the calcium isotope ratio of sea water. |
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| Keywords: | Nintyeast Ridge calcium isotope paleoceanography Indian Ocean |
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