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

fYear

2011

fDate

24-29 July 2011

Firstpage

2221

Lastpage

2224

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International

Conference_Location

Vancouver, BC

ISSN

2153-6996

Print_ISBN

978-1-4577-1003-2

Type

conf

DOI

10.1109/IGARSS.2011.6049610

Filename

6049610