| The Medieval Warm Period and Little Ice Age in the Daihai Area, North China |
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| 作者姓名： | 金章东 王苏民 |
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| 作者单位： | TheKeyLaboratoryofLakeSedimentationandEnvironment,NanjingInstituteofGeographyandLimnology,ChineseAcademyofSciences,Nanjing210008,China |
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| 基金项目： | ThisresearchprojectwassupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .4 0 0 0 30 0 1 )andbytheKey
ProjectofNanjingInstituteofGeography&Limnology (GrantNo .CXNIGLAS A0 1 2 ) . |
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| 摘 要： | Rb/Sr ratio, CaCO3 content, organic carbon (Corg) concentration, magnetic suscep-tibility and clay mineralogy of 4.0 m sediments samples recovered from Daihai Lake, northern China, are presented in the paper. Weathering and paleoclimatic change history during the last 2300 years is reconstructed in terms of the variations of Rb/Sr ratios in the sediment sequence, including the Little Ice Age and Medieval Warm Period. Our results suggest that the evolution processes of weathering and paleoclimate can be rebuilt in terms of the variations of Rb/Sr ratios in the lake sediment sequence, in combination with magnetic susceptibility, Corg, CaCO3 contents and clay mineralogy.
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| 关 键 词： | closed lake RB／Sr ratio chemical weathering Little Ice Age Medival WARM Period |
The Medieval Warm Period and Little Ice Age in the Daihai Area, North China |
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| Jin Zhangdong,Wang Suming.The Medieval Warm Period and Little Ice Age in the Daihai Area, North China[J].Chinese Journal of Geochemistry,2003,22(4):330-336. |
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| Authors: | Jin Zhangdong Wang Suming |
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| Institution: | (1) The Key Laboratory of Lake Sedimentation and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008 Nanjing, China |
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| Abstract: | Rb/Sr ratio, CaCO\-3 content, organic carbon (C\-\{org\}) concentration, magnetic susceptibility and clay mineralogy of 4.0 m sediments samples recovered from Daihai Lake, northern China, are presented in the paper. Weathering and paleoclimatic change history during the last 2300 years is reconstructed in terms of the variations of Rb/Sr ratios in the sediment sequence, including the Little Ice Age and Medieval Warm Period. Our results suggest that the evolution processes of weathering and paleoclimate can be rebuilt in terms of the variations of Rb/Sr ratios in the lake sediment sequence, in combination with magnetic susceptibility, C\-\{org\}, \{CaCO\-3\} contents and clay mineralogy. |
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| Keywords: | closed lake Rb/Sr ratio chemical weathering Little Ice Age Medieval Warm Period |
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