| 毛乌素沙地全新世地层化学元素特点及其古气候意义 |
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| 引用本文： | 陈渭南,高尚玉.毛乌素沙地全新世地层化学元素特点及其古气候意义[J].中国沙漠,1994,14(1):22-30. |
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| 作者姓名： | 陈渭南 高尚玉 |
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| 作者单位： | 中国科学院兰州沙漠研究所 |
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| 基金项目： | 中国科学院兰州地质所生物地球化学开放实验室资助项目 |
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| 摘 要： | 系统采集毛乌素沙地东、西部各一个全新世地层剖面样品作全量化学分析。根据景观地球化学特征的变化，推论一万年以来气候的变化过程：１０．５—１０ｋａ，Ｂ．Ｐ．、６—５０ｋａ，Ｂ．Ｐ．、３．５ｋａ，Ｂ．Ｐ．、２．５ｋａ，Ｂ．Ｐ．和１．５—１ｋａ，Ｂ．Ｐ．期间分别为化学风化较强，钠、钾淋失较多，而钙、镁、铝、铁、钛相对富集的相对湿润时期；夹于其间的则是化学风化较弱，钠钾相对富集，相对干燥的风化活动时期。
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| 关 键 词： | 毛乌素沙地 全新世地层 景观地球化学 气候变迁 |
ON THE HOLOCENE GEOCHEMICAL LANDSCAPE CHARACTERISTICS AND ITS PALEOCLIMATIC MEANING,MU US SAND SEA |
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| Chen Weinan, Gao Shangyu,Sun Zhong.ON THE HOLOCENE GEOCHEMICAL LANDSCAPE CHARACTERISTICS AND ITS PALEOCLIMATIC MEANING,MU US SAND SEA[J].Journal of Desert Research,1994,14(1):22-30. |
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| Authors: | Chen Weinan Gao Shangyu Sun Zhong |
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| Abstract: | Based on systematic sampling from the Holocene sedimentary section profile andanalysing of total chemical elements by X-ray fluorescence spectrometer in Lab., this paper deals withthe changes of chemical landscape characteristics, and then the Holocene climatic changes in the MU Ussand sea are also deduced. The results show that it was druing the period of 10.5 10 ka,B.P.5ka,B.P.3. 5 ka,B.P.2. 5 ka,B.P.,and 1.5 1ka,B.P.or so respoctively that the climate wasmore humid than teday, with deeper chemical weathering, more Na_2O, K_2O, SiO_2 lost. but more CaO,MgO,Al_2O_3 and Fe_2O_3 enriched relatively in the deposits. |
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| Keywords: | Mu Us Sand Sea Holocene deposits Geochemical landscape Climatic changes |
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