Seasonal variations in the Sr-Nd isotopic compositions of suspended particulate matter in the lower Changjiang River: Provenance and erosion constraints

Mao, Changping; Chen, Jun; Yuan, Xuyin; Yang, Zhongfang; Ji, Junfeng

doi:10.1007/s11434-011-4589-6

Cited by 25 publications

(23 citation statements)

References 50 publications

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“…Sediments from the tributaries were sampled at locations several kilometers upstream of the junction with the mainstream so as to prevent contamination of sediments from the mainstream. Our data show that in the lower part, the SPM consists of fine silt particles with a mean diameter of 10 μm throughout the year (Hassan et al 2010;Mao et al 2011). Furthermore, SPM accounts for 98% of the sediment discharge from the Yangtze rivermouth (Yang et al 2002).…”

Section: Methods/experimentalmentioning

confidence: 74%

ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

Saito

Tada

Zheng

et al. 2017

Prog. in Earth and Planet. Sci.

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The Asian summer monsoon exerts a strong influence on the hydrologic cycle in East Asia. Moreover, the distribution of heavy precipitation in the Yangtze River basin, which covers a large area of South China, is sensitive to changes in monsoon intensity. Thus, the paleo-distribution of heavy precipitation in the Yangtze basin is key in reconstructing the paleo-monsoon intensity. In this study, we established proxies for distinguishing sediments from the northwestern and southeastern parts of the Yangtze River basin, with the goal of using them to reconstruct the paleo-distribution of heavy precipitation in the basin based on changes in the provenance of detrital sediments, as determined using sediment records at the river mouth. The proxies included the electron spin resonance (ESR) signal intensity and the crystallinity index (CI) of quartz in modern riverbed sediments along the mainstream and tributaries of the Yangtze River. The data revealed that the fine-silt fraction of the sediments (which represents suspended particulate matter, SPM) from each major tributary can be distinguished on the basis of ESR signal intensity and CI values. The values for each tributary reflect the age and type of bedrock in the tributary basin and show distinct regional variations according to the distribution of geological blocks within the Yangtze basin. In addition, the analyzed ESR signal intensity and CI values of the fine-silt fraction of riverbed sediments below mainstream-tributary junctions agree well with values calculated according to a simple mixing model of SPM discharged from the tributaries and the mainstream.

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Section: Methods/experimentalmentioning

confidence: 74%

ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

Saito

Tada

Zheng

et al. 2017

Prog. in Earth and Planet. Sci.

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“…Due to the huge altitude difference over the Yangtze basin, the grain size of SPM carried by water in the upper reaches is larger than that in the lower reaches [19]. Water discharge during this sampling time was higher than Mao, which can leads to higher water power to carry coarser particles at water surface.…”

Section: Concentration and Grain Size Of Suspended Sedimentsmentioning

confidence: 91%

“…It drastically decreases downstream the Three Gorges and achieves a minimum value at Hukou and stays consistent (100 mg/L) before entering the ocean [19,39]. At the sampling profile of Datong station, concentration of SPM increases from surface towards bottom (Figure 2(a)).…”

Section: Concentration and Grain Size Of Suspended Sedimentsmentioning

confidence: 97%

“…Among these methods, Sr-Nd isotopic systemis widely applied to provenance study of rivers since they basically do not fractionate during weathering, erosion and transport. Although Sr-Nd isotopic system has been used for a long time [16][17][18], its application to river provenance study did notdevelop until recently [1,2,4,5,[19][20][21][22][23][24][25][26][27][28]. For example, Clift and others use U-Nd-Pb isotopic system to investigate the provenance evolution of the Red River [23], Singhand others studied the source of the sediments of Ganges River through systemic study of Sr-Nd isotopic composition [5].…”

mentioning

confidence: 99%

“…Recently, researchers have done lots of provenance studies on the Yangtze River [1][2][3]6,12,19]. However, their samples were mostly sediments collected from river bed and SPM taken from the surface of river water.…”

mentioning

confidence: 99%

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Sr-Nd isotope stratification along water depth: An example from Datong hydrological station of Yangtze River

Luo

Zheng

et al. 2012

Chin. Sci. Bull.

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This study examines the effects of hydrologic sorting and mixing of sources on the Sr-Nd isotopic compositions of suspended sediments at different water depths. The samples were collected from three layers (surface, middle and bottom) at Datong hydrological station of Yangtze River during the flood season of 2010. Our results show that, 87 Sr/ 86 Sr values decrease from surface to bottom, ranging from 0.730332 to 0.720857. ε Nd (0) values range from −14.75 to −10.09, with surface sediments being the most negative. The isotope composition at the middle layer can best represent the mean isotopic composition of the total suspended sediments transported by a river. It is believed that the stratification of Sr-Nd isotope is attributable to mixing of sediments from different sources due to hydrological sorting. Sediments from the upper stream are found to be coarser, and tend to contribute more to the lower water column. Although Sr-Nd isotope is a well acknowledged tool to trace sediment provenance, the current study suggests that the grain size of the samples and the sampling locations should be taken into consideration when applying this method to provenance study.Yangtze River, suspended sediment, Sr and Nd isotope, stratification

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U-Pb ages of zircon grains reveal a proximal dust source of the Xiashu loess, Lower Yangtze River region, China

Liu

Chen

2014

Chin. Sci. Bull.

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Seasonal variations in the Sr-Nd isotopic compositions of suspended particulate matter in the lower Changjiang River: Provenance and erosion constraints

Abstract: Suspended particulate matter samples were collected monthly for more than 2 years in Nanjing, China to examine seasonal changes in the Sr-Nd isotopic compositions of the lower Changjiang River (CR

Cited by 25 publications

References 50 publications

ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

Sr-Nd isotope stratification along water depth: An example from Datong hydrological station of Yangtze River

U-Pb ages of zircon grains reveal a proximal dust source of the Xiashu loess, Lower Yangtze River region, China

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