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| An 8.1Ma calcite record of Asian summer monsoon evolution on the Chinese central Loess Plateau | |
| 作者单位： | CHEN XiuLing（Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China） ;FANG XiaoMin（Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China） ;AN ZhiSheng（State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China） ;HAN WenXia（Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China） ;WANG Xin（College of Atmospheric Science, Lanzhou University, Lanzhou 730000,China） ;BAI Yan（Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China） ;HONG Ye（Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China） ; |
| 基金项目： | 国家重点基础研究发展计划(973计划);中国科学院"百人计划" |
| 摘 要： | Carbonates in loess-red clay sequences consist mainly of calcite and dolomite. The EDTA analysis of carbonates in different size fractions and magnetic susceptibility reveal that calcite is a sensitive index of summer monsoon. The chemical analysis of carbonates and calcite from an 8.1 Ma loess-red clay sequence at Chaona on the Chinese central Loess Plateau shows that the evolution of the Asian summer monsoon experienced four stages, namely 8.1―5.5 Ma, 5.5―2.8 Ma, 2.8―1.5 Ma and 1.5―0 Ma, with increasing intensification and fluctuation, suggesting a possible combining impacts of uplift of the Tibetan Plateau and global changes on the Asian summer monsoon. |
| 收稿时间： | 2006-06-20 |
| 修稿时间： | 2006-09-04 |
An 8.1Ma calcite record of Asian summer monsoon evolution on the Chinese central Loess Plateau |
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| Chen XiuLing,Fang XiaoMin,An ZhiSheng,Han WenXia,Wang Xin,Bai Yan,Hong Ye. An 8.1Ma calcite record of Asian summer monsoon evolution on the Chinese central Loess Plateau[J]. Science in China(Earth Sciences), 2007, 50(3): 392-403. DOI: 10.1007/s11430-007-0016-x | |
| Authors: | Chen XiuLing Fang XiaoMin An ZhiSheng Han WenXia Wang Xin Bai Yan Hong Ye |
| Affiliation: | 1. Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China 2. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China 3. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China 4. Key Laboratory of Western China's Environmental Systems (MOE) and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China 5. College of Atmospheric Science, Lanzhou University, Lanzhou 730000,China 6. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China |
| Abstract: | Carbonates in loess-red clay sequences consist mainly of calcite and dolomite. The EDTA analysis of carbonates in different size fractions and magnetic susceptibility reveal that calcite is a sensitive index of summer monsoon. The chemical analysis of carbonates and calcite from an 8.1 Ma loess-red clay sequence at Chaona on the Chinese central Loess Plateau shows that the evolution of the Asian summer monsoon experienced four stages, namely 8.1–5.5 Ma, 5.5–2.8 Ma, 2.8–1.5 Ma and 1.5–0 Ma, with increasing intensification and fluctuation, suggesting a possible combining impacts of uplift of the Tibetan Plateau and global changes on the Asian summer monsoon. Supported by NSFC Group Funds (Grant Nos. 40421101 and 40334038), the National Key Basic Research Project on the Tibetan Plateau (Grant No. 2005CB422000) and the Hundred Talents Project of the Chinese Academy of Sciences (Renjiaozi [2000] 05). |
| Keywords: | carbonates calcite evolution of Asian summer monsoon red clay-loess Chinese Loess Plateau |
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