| 西峰剖面高分辨记录指标研究及古气候重建 |
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| 引用本文： | 孙玉兵,陈天虎,谢巧勤.西峰剖面高分辨记录指标研究及古气候重建[J].高校地质学报,2009,15(1). |
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| 作者姓名： | 孙玉兵 陈天虎 谢巧勤 |
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| 作者单位： | 合肥工业大学,资源与环境工程学院,合肥,230009 |
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| 摘 要： | 对甘肃省西峰黄土-红粘土剖面的夏季风替代性指标作了全面、系统的测试,包括磁化率、频率磁化率、碳酸盐、有机质和游离氧化铁的测定,并通过碳酸盐和磁化率值来初步恢复古气候变化特征.结果表明,频率磁化率、有机质、游离铁和磁化率具有正相关关系,而碳酸盐变化与磁化率呈负相关,它们都可以很好地作为夏季风替代性指标.通过数学模型认为整个第四纪古气候变化大致可分为三个大的阶段:0～1.1 Ma BP,1.1～1.9 Ma BP和1.9～2.6 Ma BP.从0.1 Ma以来,降水量和年均温都有降低趋势,说明气候向着越来越干冷的方向演化.
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| 关 键 词： | 黄土高原 夏季风 古气候 西峰剖面 |
Substitute Indices of Summer Monsoon in Eolian Sediment and ItsP aleoclimatic Significance |
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| SUN Yu-bing,CHEN Tian-hu,XIE Qiao-qin.Substitute Indices of Summer Monsoon in Eolian Sediment and ItsP aleoclimatic Significance[J].Geological Journal of China Universities,2009,15(1). |
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| Authors: | SUN Yu-bing CHEN Tian-hu XIE Qiao-qin |
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| Institution: | School of Resource and Environment;Hefei University of Technology;Hefei 23009;China |
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| Abstract: | This paper systemically measured the proxy indices of the summer monsoon from the loess-paleosol sequences in the red clay sequences of the Xifeng profile,Gansu Province,including the values of magnetic susceptibility(MS)and frequency dependent magnetic susceptibility,and the contents of carbonate,organic matter and free iron oxides.We reconstructed the change characteristics of the paleoclimate by the carbonate contents and the values of magnetic susceptibility.The results showed that the frequency depende... |
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| Keywords: | Loess Plateau summer monsoon paleoclimate Xifeng profile |
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