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Reconstruct Paleoenvironmental Changes Based on the Results of Rb/Sr, δ13Corg, δ15Norg (Vol.46, No.2) TEXT SIZE: A A A

ZHANG Kun1,3, JI Hongbing1,2, CHU Huashuo1,3, SONG Changshun1,3, WU Yanfei1,3

(1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
2. University of Science and Technology Beijing, School of Energy and Environmental Engineering, Beijing 100083, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract: In this paper, Rb/Sr ratio, organic carbon and nitrogen isotope (δ13Corg and δ15Norg) and 14C dating results of two red soil profiles (ND and YK) were used to discuss vegetation and climate change since the late Pleistocene in Southwestern Guizhou Province, China. Results show that (1) since the late Pleistocene, the climate of the study area has experienced several cold-hot and dry-humid cycle processes at millennium scale, and the plants are mainly C4 plants; (2) there may have been more extreme weather events in the research area of 14750 a; and (3) the Rb/Sr ratio and δ13Corg values can be used to reconstruct the environmental changes in ancient soil region. The high Rb/Sr ratio and high δ13Corg indicate hot-humid climate while low Rb/Sr ratio and low δ13Corg indicate dry-cold climate.

Key words: karst; Rb/Sr; δ13Corg and δ15Norg; ancient environment; Guizhou

EARTH AND ENVIRONMENT Vol.46, No.2, Tot No.322, 2018, Page 107-113

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