| 湖泊沉积物Rb／Sr比值的古气候含义 |
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| 引用本文： | 金章东 张恩楼. 湖泊沉积物Rb／Sr比值的古气候含义[J]. 科学技术与工程, 2002, 2(3): 20-22 |
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| 作者姓名： | 金章东 张恩楼 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所,湖泊沉积与环境重点实验室,南京,210008,zhdjin@niglas.ac.cn |
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| 基金项目： | 国家自然科学基金(40003001) |
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| 摘 要： | 由于 Rb、Sr 在表生过程中地球化学性质的明显差异,不同的封闭湖盆接纳的各种气候条件下形成的连续沉积物具有明显不同含量的 Rb、Sr,沉积物 Rb/Sr 比值的变化序列可以反映流域经历的化学风化及气候演变历程。利用湖泊沉积物记录的 Rb/Sr 比值反演流域古环境变迁比利用海洋沉积物、黄土-古土壤更直接,减少了不确定性,优势明显。
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| 关 键 词： | 内陆湖泊 化学风化 气候变化 |
| 修稿时间： | 2002-03-19 |
Paleoclimate Implication of Rb/Sr Ratios from Lake Sediments |
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| JIN Zhangdong ZHANG Enlou. Paleoclimate Implication of Rb/Sr Ratios from Lake Sediments[J]. Science Technology and Engineering, 2002, 2(3): 20-22 |
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| Authors: | JIN Zhangdong ZHANG Enlou |
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| Abstract: | Due to different geochemical nature between rubidium (Rb)and strontium(Sr)during the earth's surface processes,the sediments deposited continuously in a closed lake under different paleoclimatic conditions display variations in Rb and Sr distribution, reflecting intensities of chemical weathering in a single watershed by variations in the Rb/Sr ratios.Furthermore,due to continuous deposition,high-resolution and stable source in the closed basins,the reconstruction of paleoclimate by the variation of the Rb/Sr ratios in the sediments might give a greater advantage than by that of the ocean sediments and the loess-paleosol sequence. |
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| Keywords: | inland lake chemical weathering paleoclimat change |
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