DOI: 10.1016/j.quascirev.2014.04.023
Scopus记录号: 2-s2.0-84899950811
论文题名: Controls on detrital sedimentation in the Cariaco Basin during the last climatic cycle: Insight from clay minerals
作者: Riboulleau A. ; Bout-Roumazeilles V. ; Tribovillard N.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 94 起始页码: 62
结束页码: 73
语种: 英语
英文关键词: Cariaco Basin
; Clay minerals
; Detrital sedimentation
; Eemian
; ITCZ
; Younger Dryas
Scopus关键词: Clay minerals
; Kaolinite
; Minerals
; Sea level
; Cariaco basins
; Climatic oscillations
; Eemian
; Glacial-interglacial cycles
; High resolution analysis
; Intertropical convergence zone
; ITCZ
; Younger Dryas
; Sedimentation
; clay mineral
; climate cycle
; climate variation
; detrital deposit
; Eemian
; intertropical convergence zone
; sea level change
; sedimentation
; Younger Dryas
; Atlantic Ocean
; Cariaco Basin
; Caribbean Sea
英文摘要: A high resolution analysis of the clay-mineral content of sediments of the Cariaco Basin spanning the last climatic cycle was performed in order to determine how the detrital sedimentation in the basin records climatic oscillations at various timescales. At the scale of glacial-interglacial cycles, the clay-mineral content records changes in the geographic origin of the detrital supply, from a dominantly kaolinite- and smectite-rich southern source during glacial to a more illite-rich northerly source during interglacials. Though possibly influenced by eustatic variations, these changes mostly reflect the latitudinal fluctuations of the intertropical convergence zone (ITCZ). The Eemian shows an increased contribution from the northern source compared to the Holocene. During MIS3, seasonality modulates the effect of ITCZ position and leads to increased smectite contribution. Fluctuations of the smectite and kaolinite contents during Dansgaard/Oeschger cycles reflect changes of runoff intensity. Enhanced supplies in kaolinite during Heinrich-like events and stadials also suggest remobilizations of sediments deposited on the Unare platform resulting from rapid sea-level variations. The Younger Dryas is characterized by a significantly different clay-mineral association reflecting a drastic modification of terrigenous supply. An eolian contribution would explain this peculiar mineralogy, although local contributions cannot be ruled out. A similar event is noted at the MIS6-5 transition pointing for the occurrence of a Younger Dryas-like episode during Termination II. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60262
Appears in Collections: 过去全球变化的重建
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作者单位: Université Lille 1, Laboratoire Géosystèmes, UMR 8217 CNRS, Bâtiment SN5, 59655 Villeneuve d'Ascq Cedex, France
Recommended Citation:
Riboulleau A.,Bout-Roumazeilles V.,Tribovillard N.. Controls on detrital sedimentation in the Cariaco Basin during the last climatic cycle: Insight from clay minerals[J]. Quaternary Science Reviews,2014-01-01,94