Title :
Elemental geochemistry and paleoenvironment evolution of Shell Bar section at Qarhan in the Qaidam Basin, China
Author :
Zhang, Wenxiang ; Shi, Zhengtao ; Zhang, Hucai ; Ming, Qingzhong ; Chang, Fengqin ; Lei, Guoliang ; Chen, Guangjie ; Dong, Ming
Author_Institution :
Key Lab. of Geogr. Process & Environ. Change in the Plateau, Kunming, China
Abstract :
Based on the analyses results of the major and trace elements of the acid soluble (AS) and insoluble (AI) fractions of the Shell Bar section from the Qaidam Basin(QB) in the NE Tibetan Plateau(TP), and the correlations between the related elements and their ratios, the depositional environment of the section was discussed. The results show that the major and trace elements and their ratios of AS are good proxies of the salinity, redox condition and the temperature of lake, and the elements and their ratios of AI were related with source material and chemical weathering. According to these proxies and analyses results, we reconstructed the paleoclimate and water level fluctuation history during the high lake level period lasting between 43.5 and 22.4 cal. ka BP.
Keywords :
erosion; geochemistry; geochronology; lakes; proxy records (geophysical); China; NE Tibetan Plateau; Qaidam basin; Shell Bar section; acid insoluble fractions; chemical weathering; depositional environment; elemental geochemistry; high lake level period; major element; paleoenvironment evolution; redox condition; source material; trace element; water level fluctuation history; Artificial intelligence; Chemical elements; Chemicals; Lakes; Materials; Meteorology; Sediments; Qaidam Basin; Shell Bar section; elemental geochemistry; paleoenvironment evolution;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1003-2
DOI :
10.1109/IGARSS.2011.6049610
