DOI: 10.1016/j.quascirev.2018.12.006
Scopus记录号: 2-s2.0-85058239409
论文题名: Sea level-controlled sediment transport to the eastern Arabian Sea over the past 600 kyr: Clay minerals and Sr–Nd isotopic evidence from IODP site U1457
作者: Yu Z. ; Colin C. ; Wan S. ; Saraswat R. ; Song L. ; Xu Z. ; Clift P. ; Lu H. ; Lyle M. ; Kulhanek D. ; Hahn A. ; Tiwari M. ; Mishra R. ; Miska S. ; Kumar A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 205 起始页码: 22
结束页码: 34
语种: 英语
英文关键词: Arabian sea monsoon
; Deccan traps
; Expedition 355
; Indus river
; IODP site U1457
; Sea level
Scopus关键词: Atmospheric thermodynamics
; Isotopes
; Kaolinite
; Rivers
; Sea level
; Sediment transport
; Sedimentation
; Spectrum analysis
; Arabian sea
; Deccan traps
; Expedition 355
; Indus River
; IODP site U1457
; Underwater mineralogy
; clay mineral
; Deccan Traps
; eccentricity
; mineralogy
; monsoon
; neodymium isotope
; reconstruction
; sea level change
; sea level pressure
; sediment transport
; source-sink dynamics
; strontium isotope
; submarine fan
; Arabian Sea
; Indian Ocean
; Indus River
; Laxmi Basin
; Gorgonacea
英文摘要: Long marine sequences deposited in the Arabian Sea are suitable to study the orbital sensitivity of sediment dynamics from a source-to-sink perspective. The clay mineralogy and Sr–Nd isotopic compositions have been analyzed for the detrital fraction of sediments from IODP Site U1457 located in the Laxmi basin, eastern Arabian Sea to constrain the sediment sources and reconstruct a high-resolution record of sediment export to the Indus deep-sea fan over the past 600 kyr. The 87 Sr/ 86 Sr ratio (varying from 0.7154 to 0.7255) and εNd (varying from −12.9 to −9.5) imply a mixing of sediments derived from not only the Indus River but also the rivers draining the Deccan Traps. The variations in the smectite/(illite + chlorite) ratio combined with Sr–Nd isotopes permit the reconstruction of past changes in the relative proportions of sediments derived from the Indus River (mainly illite, chlorite and kaolinite) and the Deccan Traps (smectite). The wavelet and cross-spectral analyses further reveal that sediment transport to the eastern Arabian Sea since 600 kyr is mainly dominated by sea-level variations in the eccentricity (100-kyr) band, while the Indian summer monsoon might contribute moderately to the precession (23-kyr) band. The εNd and turbidite frequency indicate that more turbidite events are associated with Indus River-sourced sediments at IODP Site U1457 during sea-level lowstands, which might reflect a reconnection of deep-sea channels to the Indus River mouth and/or reworking of previously deposited Indus River sediments located northward. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117406
Appears in Collections: 气候变化与战略
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Recommended Citation:
Yu Z.,Colin C.,Wan S.,et al. Sea level-controlled sediment transport to the eastern Arabian Sea over the past 600 kyr: Clay minerals and Sr–Nd isotopic evidence from IODP site U1457[J]. Quaternary Science Reviews,2019-01-01,205