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MIS3晚期查格勒布鲁剖面微量元素揭示的千年尺度气候变化

, PP. 719-727

Keywords: MIS3晚期,查格勒布鲁剖面,微量元素,千年尺度气候变化

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Abstract:

通过对巴丹吉林查格勒布鲁剖面时代上属MIS3晚期的地层层位(CGS3a层段)中14种微量元素的分析发现:除Co、Ba含量呈相反变化外,P、V、Cr、Mn、Ni、Zn、Pb、Y、Zr、Nb、Cu和As含量在风成沙丘砂中基本上表现为谷值,而在不同层位沙丘砂上覆的湖相中则相对为峰,构成与沉积旋回相应的元素变化旋回。元素在沙丘砂中呈现的谷值,主要揭示了干冷气候条件下东亚冬季风的侵蚀、搬运和堆积作用;在湖相中的相对富集,则与东亚夏季风盛行时暖湿气候背景下该地所处的特殊洼地地貌位置有关。元素旋回实际上代表的是东亚冬夏季风的气候变化旋回。分析结果显示:MIS3晚期剖面所在地至少经历了5次冬夏季风交替变化的气候旋回,反映了该时期我国沙漠地区的千年尺度气候变化。

References

[1]  HEINRICH H.Origin and consequences of cyclicice rafting in the northeast Atlantic ocean during the past130000years[J].Quaternary Research,1988,29;142-152.
[2]  BOND G,HEINRICH H,BROECKER W,et al.Evidence for massive discharges of icebergs into the north Atlantic ocean during the last glacial[J].Nature,1992,360;245-249.
[3]  BOND G,BROECKER W,JOHNSEN S,et al.Correlations between climate records from north Atlantic sediments and Greenland ice[J].Nature,1993,365;143-147.
[4]  DANSGAARD W,JOHNSEN S J,CLAUSEN H B,et al.Evidence for general instability of past climate from a250-kyr ice corerecord[J].Nature,1993,364;218-220.
[5]  YAO Tandong,THOMPSON L,SHI Yafeng,et al.Climatic variation since the last interglaciation recorded in the GuIiya icecore[J].Science in China(Series D),1997,40(6);662-668.
[6]  An Zhisheng.The history and variability of the East Asian paleomonsoon climate[J].Quaternary Science Reviews,2000,19(1-5);171-187.
[7]  WANG Y J,CHEN H,EDWARDS R L,et al.A high resolution absolute dated Late Pleistocene monsoon record from Hulu Cave,China[J].Science,2001,294;2345-2348.
[8]  ZHANG Hucai,MA Yuzhen,PENG Jinlan,et al.Palaeolake and palaeoenvironment between42and18ka BP in Tengger Desert,NW China[J].Chinese Science Bulletin,2002,47(24);1847-1857.
[9]  牟保磊.元素地球化学[M].北京;北京大学出版社,1999.[MOU Baolei.Elementge hemistry[M].Beijing;Peking University Press,1999.]
[10]  赵振华.微量元素地球化学原理[M].北京;科学出版社,1997.[ZHAO Zhenhua.The elements of the trace element geochemi stry[M].Beijing;Science Press,1997.]

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