气候变化领域集成服务门户(CCPortal): Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50;000 years

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DOI	10.1016/j.quascirev.2019.04.008
	Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50;000 years
	Liu J.; He W.; Cao L.; Zhu Z.; Xiang R.; Li T.; Shi X.; Liu S.
发表日期	2019
ISSN	0277-3791
起始页码	164
结束页码	177
卷号	212
英文摘要	The Bengal Fan, as the largest submarine fan in the world, receives a large amount of sediments discharged from the Himalayas through the Ganges-Brahmaputra (G-B) river system. However, previous studies of this system seldom focused on the role of channels, which are widely developed in the Bengal Fan, in sediment transportation over the last glacial cycle. Here, we discuss the coupled sedimentary archive in two gravity cores along the Active Channel in the Bengal Fan. Our findings are based on grain size, clay minerals, and Sr and Nd isotope compositions of these two sediment cores. End-member modeling of grain-size data reveals that the intermediate end-member represents the flux of distal fluvial particles from the G-B river system, the fine end-member denotes regional sediment supply of weathered volcanic materials, especially from the eastern Indian Peninsula, and the coarse end-member probably reflects nearby terrigenous input, aeolian input and/or volcanic glass. Sediment provenance analysis based on clay minerals, and Sr and Nd isotopes confirmed sediment supply from the G-B river system which was characterized by high illite percentage, high 87Sr/86Sr ratios and low εNd values, especially during five stages (50–45 ka, 42–37 ka, 31–28.5 ka, 24–20 ka and 14–9 ka). During these stages, heavy fine-grained sediment supply from the G-B river system was discharged into the study area under the influence of climate change rather than sea-level fluctuation, additionally emphasizing the importance of channels in the sediment transport process. Moreover, we find a significant alteration of sediment sources at ∼26 ka, which may be related to conversion of the deep-water currents in the Bay of Bengal. © 2019 Elsevier Ltd
英文关键词	Clay minerals; Fine-grained sediment; Grain size; Heinrich events; Last glacial maximum; Northeastern indian ocean; Sea-level fluctuation; Sediment provenance; Sr and Nd isotopes
语种	英语
scopus关键词	Clay minerals; Glacial geology; Grain size and shape; Isotopes; Particle size analysis; Rivers; Sea level; Sediment transport; Sedimentation; Volcanoes; Fine-grained sediment; Grain size; Heinrich Events; Indian ocean; Last Glacial Maximum; Sea-level fluctuations; Sediment provenance; Sr and Nd isotopes; Climate change; climate change; fine grained sediment; Heinrich event; illite; isotopic composition; Last Glacial Maximum; provenance; river system; sea level change; sediment transport; strontium isotope; submarine fan; Bay of Bengal; Bengal Fan; Himalayas; Indian Ocean; Indian Ocean (Northeast)
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151940
作者单位	Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Liu J.,He W.,Cao L.,et al. Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50;000 years[J],2019,212.
APA	Liu J..,He W..,Cao L..,Zhu Z..,Xiang R..,...&Liu S..(2019).Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50;000 years.Quaternary Science Reviews,212.
MLA	Liu J.,et al."Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50;000 years".Quaternary Science Reviews 212(2019).