DOI: 10.1016/j.quascirev.2014.01.022
Scopus记录号: 2-s2.0-84896705054
论文题名: Age through tandem correlation of Quaternary relative paleointensity (RPI) and oxygen isotope data at IODP Site U1306 (Eirik Drift, SW Greenland)
作者: Channell J.E.T. ; Wright J.D. ; Mazaud A. ; Stoner J.S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 88 起始页码: 135
结束页码: 146
语种: 英语
英文关键词: Deep Western Boundary Current
; Eirik drift
; North Atlantic
; Oxygen isotopes
; Quaternary
; Relative paleointensity
Scopus关键词: Deep western boundary currents
; Eirik drift
; North Atlantic
; Oxygen isotopes
; Quaternary
; Relative paleointensity
; Glacial geology
; Oxygen
; Sediments
; Isotopes
; age determination
; interglacial
; last deglaciation
; Ocean Drilling Program
; oxygen isotope
; paleoceanography
; planktonic foraminifera
; salinity
; sediment transport
; sedimentation rate
; western boundary current
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Eirik Drift
; Greenland
英文摘要: Planktic oxygen isotope (δ18O) and relative paleointensity (RPI) data are used in tandem to generate an age model for the last 1 Myr from Integrated Ocean Drilling Program (IODP) Site U1306 drilled on the crest of the Eirik Drift (SW Greenland) in 2272m water depth. For the 1-1.5Ma interval, the age model is based on RPI alone due to insufficient foraminifera for isotope analyses. Utilizing RPI and δ18O in tandem allows recognition of low-δ18O "events" prior to glacial Terminations I, III, IV, V, VII, VIII, IX and X, that are independently supported by radiocarbon dates through the last deglaciation, and are attributed to local or regional surface-water effects. At Site U1306, Quaternary sedimentation rates (mean ~15cm/ka) are elevated during peak glacials and glacial onsets, and are reduced during interglacials, in contrast to the pattern at Site U1305 in 3460m water depth at the distal toe of the drift, 191km SW of Site U1306. The contrasting sedimentation-rate pattern appears to hold for the entire ~1.5 Myr record. The slackening and/or shoaling (due to lowered salinity) of the Deep Western Boundary Current (DWBC) during glacial intervals coincided with greater sediment supply to Site U1306 whereas the deepening, and possibly increased vigor, of the DWBC during interglacial intervals boosted sediment supply to Site U1305. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60363
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geological Sciences, University of Florida, POB 112120, Gainesville, FL 32611, United States; Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS, Gif-sur-Yvette, France; College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Channell J.E.T.,Wright J.D.,Mazaud A.,et al. Age through tandem correlation of Quaternary relative paleointensity (RPI) and oxygen isotope data at IODP Site U1306 (Eirik Drift, SW Greenland)[J]. Quaternary Science Reviews,2014-01-01,88