| 南京林峰桥剖面记录的22600—18550aBP的环境演变信息 |
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| 引用本文： | 关勇,朱诚.南京林峰桥剖面记录的22600—18550aBP的环境演变信息[J].地层学杂志,2006,30(4):351-355. |
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| 作者姓名： | 关勇 朱诚 |
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| 作者单位： | 南京大学城市与资源学系,江苏南京,210093 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金，南京大学校科研和教改项目，面向21世纪教育振兴行动计划(985计划)，江苏省南京大学校科研和教改项目 |
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| 摘 要： | 通过对林峰桥剖面的磁化率值,Rb、Sr含量和14C年代等的测定,发现在21070aBP前后,磁化率值异常增高,Rb/Sr比值降低,揭示出南京江北地区在这一时段,风化淋溶作用不强,可能经历了一次突然的气候冷干事件,与北半球广泛记录的Heinrich事件的H2同时期,可能是Heinrich事件在东亚季风区的又一响应。
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| 关 键 词： | Rb/Sr 磁化率 林峰桥 南京 江苏 环境演变 Heinrich事件 |
| 文章编号： | 0253-4959(2006)04-0351-05 |
| 修稿时间： | 2006年4月17日 |
INFORMATION OF ENVIRONMENTAL EVOLUTION DURING 22 600-18 550a BP INFERRED FROM THE LINFENGQIAO PROFILE, NANJING |
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| GUAN Yong,ZHU Cheng.INFORMATION OF ENVIRONMENTAL EVOLUTION DURING 22 600-18 550a BP INFERRED FROM THE LINFENGQIAO PROFILE, NANJING[J].Journal of Stratigraphy,2006,30(4):351-355. |
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| Authors: | GUAN Yong ZHU Cheng |
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| Abstract: | Analyses of the magnetic susceptibility, the content of Rb and Sr elemental geochemisty and ~ 14 C dating of the Linfengqiao profile suggest that the magnetic susceptibility increases remarkably, and that the Rb/Sr ratio drops abruptly about 21 070a BP. These data indicate that during this period chemical weathering and eluviation were weak in the north bank of Yangtze River, possibly recording a cold-dry environment at that time. This cold-dry event may be coeval with the Heinrich2 event which is widely recorded in the Northern Hemisphere. Thus it may represent a climatic response of the Heinrich2 event in the eastern Asia monsoon area. |
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| Keywords: | Rb/Sr magnetic susceptibility Nanjing Jiangsu environmental evolution Heinrich events |
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