Sources and trace element geochemical characteristics of the coarse sediment in the Ningxia-Inner Mongolia reaches of the Yellow River

다국어 초록 (Multilingual Abstract)

Siltation of coarse sediment in the river channel isthe main cause of flooding and dike burst on China’s Yellow River,and the loess are thought as the coarse sediment sources of the lowerreach of the Yellow River. The Ningxia-Inner Mongolia reaches ofthe Yellow River flow through an extensive area of aeolian desert,with flood events occurring frequently in this region. In this paper,we investigate the trace element contents of the coarse sediment inthe Ningxia-Inner Mongolia reaches of the Yellow River. The mainchemical components of the coarse sediments consist of 28 traceelements. Correlation analysis and factor analysis of 21 of thesetrace elements indicates that Ti and Zr are stable indicators of thecoarse sediment sources. Comparing the spatial distribution of someof the main trace elements to major sources and riverbed sedimentof the main reaches of the Yellow River suggests that the coarsesediments deposited in the Ningxia-Inner Mongolia reaches aremostly controlled by the local sediment sources. The results of R-factoranalysis further proved that desert sand, riverbank material,and the Ten Tributaries are the primary sources of the coarse sedimentin the Ningxia-Inner Mongolia reaches of the Yellow River.

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