Geochemical comparisons of weathering, provenance and tectonics in the fluvial sediments from Yarlung Zangbo to Brahmaputra River

Huyan, Yuying; Yao, Wensheng

doi:10.1016/j.catena.2021.105944

Cited by 14 publications

(5 citation statements)

References 81 publications

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“…Compared the major elements and trace elements (see Section 4.2.2), we found that major elements are more reliable to identify sediment provenance ini the Yarlung Zangbo Riber. These results differ greatly from those of Huyan and Yao (2022), who found that the sediments they collected from riverbanks were mainly quartzose, felsic igneous and intermediate igneous sources. Huyan and Yao (2022) interpreted their results to mean that aeolian sediment in the Yarlung Zangbo River came from the Lhasa Terrane in the north and the Himalayan orogen in the south.…”

Section: Sediment Provenancecontrasting

confidence: 99%

“…These results differ greatly from those of Huyan and Yao (2022), who found that the sediments they collected from riverbanks were mainly quartzose, felsic igneous and intermediate igneous sources. Huyan and Yao (2022) interpreted their results to mean that aeolian sediment in the Yarlung Zangbo River came from the Lhasa Terrane in the north and the Himalayan orogen in the south. The difference between our study and the results of Huyan and Yao (2022) probably results from two main factors: we collected our samples from riverbanks and not from the Lhasa River, whereas Huyan and Yao (2022) collected samples from the Lhasa River.…”

Section: Sediment Provenancecontrasting

confidence: 99%

“…Both the aeolian and fluvial sediments were dominated by litharenite, followed by greywacke, in the middle reaches, by litharenite in the upper reaches, and by litharenite with arkose on the south side of the river (Figure 9a) (Herron, 1988; Pettijohn et al, 1995), which is similar to the results of Huyan and Yao (2022). Meanwhile, fluvial sediments in the middle reaches were similar as clastic rocks in the Tsedang, which means that some fluvial sediment erosion from Tsedang.…”

Section: Discussionsupporting

confidence: 83%

“…As in the study of Wei et al (2022), clastic rocks in the middle reaches (Tsedang) were more weathered than those in the upper reaches (Xigaze) (Figure 13a). However, Huyan and Yao (2022) reported a mean Th/U ratio of 5.6 ± 1.4 for the riverbed samples, which means that sediment weathering processes differed as a function of the sediment transport distance. Compared with the clastic rocks (Wei et al, 2022), most of the aeolian sediment in the middle reaches was most similar to clastic rocks in the Tsedang and Lhasa samples for Th/U vs. Th and for Zr/Sc vs. Th/Sc (Figure 13).…”

Section: Discussionmentioning

confidence: 98%

“…Huyan and Yao (2022) interpreted their results to mean that aeolian sediment in the Yarlung Zangbo River came from the Lhasa Terrane in the north and the Himalayan orogen in the south. The difference between our study and the results of Huyan and Yao (2022) probably results from two main factors: we collected our samples from riverbanks and not from the Lhasa River, whereas Huyan and Yao (2022) collected samples from the Lhasa River. (Bhuiyan et al, 2011) Huyan and Yao (2022) used major, trace, and rare earth (REE) elements, whereas we focused on major elements.…”

Section: Discussionmentioning

confidence: 99%

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Aeolian sediment provenance and transport in the upper and middle reaches of the Yarlung Zangbo River, Tibet Plateau

Zhang

Ma²,

La³

et al. 2022

Basin Research

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Frequent and serious aeolian disasters occur in the upper and middle reaches of the Yarlung Zangbo River, which runs through the high-elevation Tibet Plateau. Sediment geochemical characteristics can be used as a proxy to identify the sediment's provenance. To determine the provenance of aeolian sediments in the river's basin, we analysed major and trace element contents from surface samples and local clastic rocks throughout the basin. We found that the major and trace elements differed between the middle reaches, upper reaches and regions south of the river. Major element contents were similar in the upper and middle reaches, but trace elements differed. Al 2 O 3 , MgO and Na 2 O concentrations increased from the upper reaches to the lower reaches, and in the lower reaches, MgO and Na 2 O were enriched compared with the crustal average. The similarities between samples in the lower part of the upper reaches and those in the middle reaches indicated that sediment transported by fluvial systems from the upper reaches were first deposited in the wide valleys near Xigaze, where they formed a large area of shifting sand. These deposits were then transported by the wind to the river's middle reaches, where they formed a large area of shifting sand. When we compared aeolian sediment in the middle reaches with the local clastic rocks, they appeared to be unrelated.The difference between sediments south of the river and those in the middle reaches means that the southern sediments were not transported to the middle reaches. Therefore, the aeolian sediment in the middle reaches of the Yarlung Zangbo River mainly came from the lower part of the upper reaches, not from the local clastic rocks.

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Section: Sediment Provenancecontrasting

confidence: 99%