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《JOURNAL OF DESERT RESEARCH》 1994-01
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ON THE HOLOCENE GEOCHEMICAL LANDSCAPE CHARACTERISTICS AND ITS PALEOCLIMATIC MEANING,MU US SAND SEA

Chen Weinan; Gao Shangyu;Sun Zhong(Institute of Desert Research,Academia Sinica,Lanzhou.730000)  
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.
【Key Words】: Mu Us Sand Sea Holocene deposits Geochemical landscape Climatic changes
【Fund】: 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
【CateGory Index】: P594.2
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