Reconstruction of the Paleo-Environment in Changchun Area, Northeast China during the Late Mid-Pleistocene: Evidences from Sedimentary Geochemistry and Palynology
详细信息   
摘要

    

On the basis of TL dating and grain size analysis of the Core HDBZK-1 samples in the Changchun area, the authors employ K2O, Na2O, MgO, CaO, Al2O3 and their ratios, K2O/Na2O and Al2O3/(Al2O3+CaO+Na2O), which are sensitive to environmental changes, combined with pollen analysis, to analyze the climate environment change of the Changchun area during the Late Mid-Pleistocene  (probably from 280 to 120 ka B.P.). The results show that the Changchun area has experienced four distinctive cold-dry and warm-wet paleoclimate changes during the Late Mid-Pleistocene, which probably comply with the climate cycles reflected by deep-sea oxygen isotope curves.

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