Characteristics of the Yellow River sediment elements from the "source" to "sink" of the preliminary study

Title: Characteristics of the Yellow River sediment elements from the "source" to "sink" of the preliminary study
　　Author: Fang Fang
　　Degree-granting units: China University of Geosciences (Beijing)
　　Keywords: sediment;; constant element;; trace elements;; chemical weathering;; material source
　　Summary:
　　In this paper, the principle element geochemistry of the Yellow River source region Tangnaihai nine regions plus I stream sediment samples of the size of the test and the analysis of trace elements in common, and the composition of the rock with the study area, the Yellow River Loess, the Yellow River estuary Bohai Sea surface sediments and sediment geochemistry, Neodymium Magnets by comparing the Yellow River source region of Yellow River estuary sediments and sediment geochemistry on the differences in an attempt to explore the Yellow River source rock weathering intensity, the Yellow River sediment provenance tracer substances in the source region and the extent to which the Yellow River estuary and the Bohai Sea surface sediments of the compositions.
　　Sediments of the study area through constant element analysis shows that the chemical index of alteration sediment (CIA) between 59.67-69.15 with an average of 64.34, and loess sediments of the Yellow River estuary and the Bohai Sea surface sediments of the degree of weathering the same, showed a lower degree of chemical weathering, reflecting the weathering of the Yellow River Basin, the main source rock in the background may be more cold and dry in the Quaternary climatic conditions started.
　　Sediment through the study area of ​​high field strength elements (HFSE), large ion lithophile elements (LILE), transition metal elements (TTE) and rare earth elements (REE) and other trace element analysis shows that the tectonic setting of sediment provenance more single, more in the continental island arc tectonic setting, may be formed in the Paleo-Tethys poly-island ocean - continent subduction zone environment, the source of acid rock material to the main rock type, and loess sediments of the Yellow River estuary and the Bohai Sea surface sediments material composition of the material source of highly consistent; sediment samples show chondrite-normalized http://www.everbeenmagnet.com/en/products/110-sintered-neodymium-magnets REE LREE enrichment and heavy REE distribution patterns of loss, and showed moderate δEu abnormalities (δEu = 0.68), showing no δCe abnormal or weak δCe (δCe = 0.94), sediments of the North American shale-normalized model flat, almost no significant LREE fractionation; trace elements in the crust and the standardization of the North American shale model shows that the main source of sediment material to granodioritic of the material based on the continental crust. Comparison of the study area sediments, loess Yellow River, Yellow River estuary surface sediments of the Bohai Sea sediments and trace elements showed that these types of substances in the composition of the source material has a considerable degree of consistency, the Yellow River in the "source" and "sink" relationship more closely.
　　Degree Year: 2010