Western equatorial Pacific productivity and carbonate dissolution over the last 550 kyr:Foraminiferal and nannofossil enidence from ODP Hole 807A
| 作者： |
Jiangyong Zhang |
| 英文作者： |
Jiangyong Zhang |
| 联系作者： |
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| 英文联系作者： |
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| 发表年度： |
2007 |
| 卷： |
64 |
| 摘要： |
We analyzed foraminiferal and nannofossil assemblages and stable isotopes in samples from ODP Hole 807A on the Ontong Java Plateau in order to evaluate productivity and carbonate dissolution cycles over the last 550 kyr (kilo year) in the western equatorial Pacific. Our results indicate that productivity was generally higher in glacials than during interglacials, and gradually increased since MIS 13. Carbonate dissolution was weak in deglacial intervals, but often reached a maximum during interglacial to glacial transitions. Carbonate cycles in the western equatorial Pacific were mainly influenced by changes of deep-water properties rather than by local primary productivity. Fluctuations of the estimated thermocline depth were not related to glacial to interglacial alternations, but changed distinctly at ∼ 280 kyr. Before that time the thermocline was relatively shallow and its depth fluctuated at a comparatively high amplitude and low frequency. |
| 刊物名称： |
Marine Micropaleontology |
| 参与作者： |
Jiangyong Zhang, Pinxian Wang, Qianyu Li, Xinrong Cheng, Haiyan Jin, Shiying Zhang |
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