Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50,000 years

doi:10.1016/j.quascirev.2019.04.008

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Staged fine-grained sediment supply from the Himalayas to the Bengal Fan in response to climate change over the past 50,000 years
	Liu, Jianguo 2; He, Wei 1; Cao, Li 1; Zhu, Zhu 1; Xiang, Rong ; Li, Tiegang 1,2,3; Shi, Xuefa 2,3; Liu, Shengfa 2,3
刊名	QUATERNARY SCIENCE REVIEWS
	2019
卷号	212 页码:164
关键词	Sediment provenance Heinrich events Sea-level fluctuation Northeastern indian ocean Last glacial maximum Clay minerals Grain size Sr and Nd isotopes Fine-grained sediment
ISSN号	0277-3791
DOI	10.1016/j.quascirev.2019.04.008
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 Sr-87/Sr-86 ratios and low e Nd 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 similar to 26 ka, which may be related to conversion of the deep-water currents in the Bay of Bengal. (C) 2019 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17957]
专题	南海海洋研究所_中科院边缘海地质重点实验室
作者单位	1.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jianguo,He, Wei,Cao, Li,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]. QUATERNARY SCIENCE REVIEWS,2019,212:164, 177.
APA	Liu, Jianguo.,He, Wei.,Cao, Li.,Zhu, Zhu.,Xiang, Rong.,...&Liu, Shengfa.(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,212,164.
MLA	Liu, Jianguo,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):164.