DOI: 10.1016/j.quascirev.2016.06.016
Scopus记录号: 2-s2.0-84976351993
论文题名: Climatic control of sediment transport from the Himalayas to the proximal NE Bengal Fan during the last glacial-interglacial cycle
作者: Joussain R. ; Colin C. ; Liu Z. ; Meynadier L. ; Fournier L. ; Fauquembergue K. ; Zaragosi S. ; Schmidt F. ; Rojas V. ; Bassinot F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 148 起始页码: 1
结束页码: 16
语种: 英语
英文关键词: Bengal Fan
; Clay mineralogy
; Indian monsoon
; Sea levels
; Siliciclastic grain-size
; Sr and Nd isotopic compositions
Scopus关键词: Atmospheric thermodynamics
; Clay minerals
; Floods
; Glacial geology
; Grain size and shape
; Isotopes
; Kaolinite
; Minerals
; Rain
; Rivers
; Sea level
; Sediment transport
; Sedimentation
; Underwater mineral resources
; Underwater mineralogy
; Clay mineralogy
; Grain size
; Hydrological condition
; Indian monsoon
; Marine isotopic stages
; Mineralogical compositions
; Nd isotopic compositions
; Summer monsoon rainfall
; Sediments
; clay mineral
; deep-sea sediment
; detritus
; glacial deposit
; glacial-interglacial cycle
; grain size
; isotopic composition
; marine isotope stage
; monsoon
; neodymium isotope
; pedogenesis
; reconstruction
; sea level change
; sediment transport
; siliciclastic deposit
; smectite
; strontium isotope
; turbidite
; Bengal Fan
; Brahmaputra River
; Ganges River
; Gangetic Plain
; Himalayas
; Indian Ocean
; Gorgonacea
英文摘要: Clay mineralogy, siliciclastic grain-size, major elements, 87Sr/86Sr, and εNd analyses of deep-sea sediments cored in the north-eastern Bay of Bengal are used to reconstruct evolution of detrital sources and sediment transport to the proximal part of the Bengal deep-sea fan during the last climatic cycle. εNd values (-13.3 to -9.7) and 87Sr/86Sr ratios (0.721-0.733) indicate a mixture of sediments originating from the Ganges-Brahmaputra rivers and the Indo-Burman ranges. Interglacial Marine Isotopic Stages (MIS) 5 and 1 are associated with a higher contribution of sediments from the Ganges-Brahmaputra river system than is the case for glacial MIS 6, 4, 3, and 2. Siliciclasitic grain-size combined with Si/Al and Si/Fe ratios indicate coarser glacial sediments with numerous turbidite layers. Glacial turbidite layers display similar clay mineralogical compositions to hemipelagic sediments. Only few of turbidite layers (MIS 6, 4, and 2) are slightly unradiogenic (εNd -13.3), suggesting a higher contribution of Ganges-Brahmaputra river sediments. Independently of changes in the sedimentary sources, the smectite/(illite + chlorite) ratio of cores located on the NE Bengal Fan indicates higher inputs of primary minerals (illite and chlorite) from the highlands of the river basins (relief) during glacial MIS 6, 4, 3, and 2 and an increased contribution of pedogenic minerals (smectite and kaolinite) during interglacial MIS 5 and 1. Maximum smectite/(illite + chlorite) ratios during the warm sub-stages of MIS 5 suggest an intensification of summer monsoon rainfall associated with higher rates of physical erosion of the Indo-Gangetic flood-plain and/or dominant summer hydrological conditions transporting a higher proportion of sediments deriving from the Ganges-Brahmaputra rivers to the NE Bengal Fan. In addition, a higher production of smectite in soils of the Indo-Gangetic flood-plain during periods of intensification of monsoon rainfall cannot be excluded. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59480
Appears in Collections: 过去全球变化的重建
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作者单位: State Key Laboratory of Marine Geology, Tongji University, Shanghai, China; GEOPS, Univ Paris Sud, CNRS, Université Paris-Saclay, Université Paris Sud, Bât. 504, Orsay, France; Equipe de Géochimie et Cosmochimie, Institut de Physique du Globe de Paris - Sorbonne Paris Cité, UMR 7154, Université Paris Diderot, Paris, France; UMR CNRS 5805 EPOC, Université de Bordeaux, Bâtiment B18, Pessac Cedex, France; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
Recommended Citation:
Joussain R.,Colin C.,Liu Z.,et al. Climatic control of sediment transport from the Himalayas to the proximal NE Bengal Fan during the last glacial-interglacial cycle[J]. Quaternary Science Reviews,2016-01-01,148