| Ostracod Mg/Sr/Ca and 87Sr/86Sr geochemistry from Tibetan lake sediments: Implications for early to mid-Pleistocene Indian monsoon and catchment weathering | |
| Z. D. Jin; MIKE J.BICKLE; HAZEL J. CHAPMAN; J. M. Yu; Z. S. An; S. M. Wang; MERVYN J.GREAVES | |
| 2011 | |
| 发表期刊 | Boreas
 |
| 卷号 | 40期号:2页码:320-331 |
| 合作性质 | 国际 |
| 摘要 | Lacustrine sediment serves as a valuable archive for tracing catchment weathering processes associated with past climatic and/or tectonic changes. High-resolution records of fossil ostracod Mg/Ca, Sr/Ca and 87Sr/86Sr ratios from a lake sediment core from the central Tibetan Plateau reveal a temporal link between lake-water chemistry and catchment weathering and distinct monsoonal oscillations over the early to mid-Pleistocene. Between 2.01 and 0.95 Ma, lake-water chemistry was dominated by a high proportion of carbonate weathering related to variations in the Indian monsoon, resulting in relatively low and constant ostracod 87Sr/86Sr but obvious fluctuations in Mg/ Ca, Sr/Ca and d18O. Across the mid-Pleistocene transition (MPT), a significant increase in 87Sr/86Sr and frequently fluctuating ratios of ostracod Mg/Ca, Sr/Ca and d18O are coincident with increases in both Chinese loess grain size and Arabian Sea lithogenic flux. This correlation indicates an increased glaciation and a strong monsoon seasonal contrast over the plateau. The increase in lake-water 87Sr/86Sr across the MPT highlights a change in catchment weathering patterns, rather than one in climate-enhanced weathering intensity, with an increased weathering of 87Sr-rich minerals potentially induced by marked extensive glaciation and strong seasonality in the central plateau. |
| 学科领域 | 地质学 ; 地球化学 ; 环境科学 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000288759400008 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/2533 |
| 专题 | 加速器质谱中心 |
| 推荐引用方式 GB/T 7714 | Z. D. Jin,MIKE J.BICKLE,HAZEL J. CHAPMAN,et al. Ostracod Mg/Sr/Ca and 87Sr/86Sr geochemistry from Tibetan lake sediments: Implications for early to mid-Pleistocene Indian monsoon and catchment weathering[J]. Boreas,2011,40(2):320-331. |
| APA | Z. D. Jin.,MIKE J.BICKLE.,HAZEL J. CHAPMAN.,J. M. Yu.,Z. S. An.,...&MERVYN J.GREAVES.(2011).Ostracod Mg/Sr/Ca and 87Sr/86Sr geochemistry from Tibetan lake sediments: Implications for early to mid-Pleistocene Indian monsoon and catchment weathering.Boreas,40(2),320-331. |
| MLA | Z. D. Jin,et al."Ostracod Mg/Sr/Ca and 87Sr/86Sr geochemistry from Tibetan lake sediments: Implications for early to mid-Pleistocene Indian monsoon and catchment weathering".Boreas 40.2(2011):320-331. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Boreas-2010-JIN.pdf（986KB） | 开放获取 | 使用许可 | 请求全文 | |||
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