DOI: 10.1016/j.tecto.2021.228974
论文题名: Clay-mineral distribution in recent deep-sea sediments around Taiwan: Implications for sediment dispersal processes
作者: Nayak K. ; Lin A.T.-S. ; Huang K.-F. ; Liu Z. ; Babonneau N. ; Ratzov G. ; Pillutla R.K. ; Das P. ; Hsu S.-K.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 814 语种: 英语
中文关键词: Clay minerals
; Kuroshio current
; Luzon
; Provenance
; River-fed turbidity currents
; Taiwan
英文关键词: Ocean currents
; Rivers
; Sediment transport
; Turbidity
; Underwater mineral resources
; Underwater mineralogy
; Clay mineral assemblages
; Fine-grained sediment
; Mineral distribution
; Relative abundance
; Seafloor sediments
; Sediment dispersal process
; Transportation system
; Turbidity current
; Clay minerals
; clay mineral
; deep-sea sediment
; mineralogy
; provenance
; sediment core
; sediment transport
; turbidity current
; Kuroshio Current
; Luzon
; Pacific Ocean
; Philippines
; Taiwan
英文摘要: Clay-mineralogy study of Taiwanese river-mouth sediments, recent deep-water seafloor sediments around Taiwan, along with sediments collected from the Tainan shelf edge, have been investigated to access the source and transport of detrital fine-grained sediments. We determined the clay mineralogy in both hemipelagites and turbidites in the top 50 cm of the deep-sea sediment cores to infer how sediments are dispersed through river-fed turbidity currents, hypopycnal plumes, and oceanic currents. Our results show that the clay mineral assemblages in both hemipelagites and turbidites of different provinces change gradually between two major end-members: illite+chlorite and smectite. They are predominantly sourced from Taiwan and Luzon, respectively. The relative abundances of clay minerals in turbidites and hemipelagites are quite similar in most of the cores. Therefore, we argue that the adjacent turbidites and hemipelagites of a core share common detrital clay sources. We found that smectite is relatively abundant around Taiwan, indicating that the Kuroshio Current is an important transportation system, which brings smectite from Luzon. Besides, the river-related canyon systems consist dominantly of illite and chlorite, and less smectite, indicating that the smectite brought about by the Kuroshio Current is diluted by river-fed hyperpycnal and hypopycnal flows. This also implies that flood-induced turbidity currents are efficient agents for transporting Taiwan-derived sediments into the neighboring deep-sea basins. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170874
Appears in Collections: 气候变化与战略
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作者单位: Earth System Science Program, Taiwan International Graduate Program, Academia Sinica and National Central University, Taiwan; Department of Earth Sciences, National Central University, Taiwan; Institute of Earth Sciences, Academia Sinica, Taiwan; State Key Laboratory of Marine Geology, Tongji University, Shanghai, China; UMR6538 Laboratoire Geosciences Océan, IUEM, Université de Brest, France; Université Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, IRD, Géoazur, Nice, France
Recommended Citation:
Nayak K.,Lin A.T.-S.,Huang K.-F.,et al. Clay-mineral distribution in recent deep-sea sediments around Taiwan: Implications for sediment dispersal processes[J]. Tectonophysics,2021-01-01,814