| 南京老虎山黄土剖面中铷锶地球化学和磁化率与古气候变化的关系 |
| |
| 引用本文： | 李福春,谢昌仁 金章东,潘根兴.南京老虎山黄土剖面中铷锶地球化学和磁化率与古气候变化的关系[J].中国地质,2003,30(1):93-98. |
| |
| 作者姓名： | 李福春 谢昌仁 金章东 潘根兴 |
| |
| 作者单位： | 1. 南京农业大学资源与环境科学学院,江苏,南京,210095
2. 中国科学院南京地理与湖泊研究所,江苏,南京,210008 |
| |
| 基金项目： | 中国博士后科学基金项目(第30批)资助 |
| |
| 摘 要： | 宁镇地区的下蜀黄土记录了古气候变化的丰富信息，作为中国北方风尘堆积的南部边缘相，下蜀黄土在全球环境变化研究中占有重要的地位。本文以10cm间距系统分析了老虎山剖面的Rb、Sr含量和频率磁化率。结果显示，磁化率和Rb含量可以较好地指示东亚冬季风强度变化；Rb/Sr比可以作为下蜀黄土化学风化强度的替代性指标；剖面的Rb/Sr比由下至上升高是南京地区12万年以来化学风化作用增强的结果。
|
| 关 键 词： | 铷锶地球化学 磁化率 黄土－古土壤 古气候变化 南京市 化学风化作用 |
| 文章编号： | 1000-3657(2003)01-0093-06 |
Rubidium and strontium geochemistry in the Laohushan loess section, Nanjing,and relation between magnetic susceptibility and paleoclimatic change |
| |
| LI Fu-chun,XIE Chang-ren,JIN Zhang-dong,PAN Gen-xing.Rubidium and strontium geochemistry in the Laohushan loess section, Nanjing,and relation between magnetic susceptibility and paleoclimatic change[J].Chinese Geology,2003,30(1):93-98. |
| |
| Authors: | LI Fu-chun XIE Chang-ren JIN Zhang-dong PAN Gen-xing |
| |
| Institution: | LI Fu - chun 1,XIE Chang- ren 1,JIN Zhang - dong 2,PAN Gen - xing 1 |
| |
| Abstract: | The Xiashu loess in the Nanjing-Zhenjiang area records abundant information of the paleoclimatic change.The Xiashu loess,as a facies at the southern margin of eolian and dusty accumulations in northern China,occupies an important position in the study of the global environmental change.The authors systematically analyzed the Rb and Sr concentrations and magnetic susceptibility at the Laohushan section at10cm intervals.The results show that the Rb concentration and magnetic susceptibility may better indicate the variations in intensity of the East Asian monsoon and that the Rb/Sr ratio may server as a substitute proxy for chemical weathering of the Xiashu loess.The increase of the Rb/Sr ratio at the section from below upward is the result of intensification of chemical weathering over the last120ka. |
| |
| Keywords: | rubidium and strontium geochemistry magnetic susceptibility loess paleosol paleoclimatic change Laohushan Nanjing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国地质》浏览原始摘要信息 |
| 点击此处可从《中国地质》下载免费的PDF全文 |
