Age through tandem correlation of Quaternary relative paleointensity (RPI) and oxygen isotope data at IODP Site U1306 (Eirik Drift, SW Greenland)

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doi: 10.1016/j.quascirev.2014.01.022
Author(s): Channell, J. E. T.; Wright, J. D.; Mazaud, A.; Stoner, J. S.
Author Affiliation(s): Primary:
University of Florida, Department of Geological Sciences, Gainesville, FL, United States
Rutgers University, United States
Laboratoire des Sciences du Climat et de l'Environnement, France
Oregon State University, United States
Volume Title: Quaternary Science Reviews
Source: Quaternary Science Reviews, Vol.88, p.135-146. Publisher: Elsevier, International. ISSN: 0277-3791
Note: In English. 58 refs.; illus., incl. 1 table, sketch map
Summary: 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 2272 m water depth. For the 1-1.5 Ma 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 ∼15 cm/ka) are elevated during peak glacials and glacial onsets, and are reduced during interglacials, in contrast to the pattern at Site U1305 in 3460 m water depth at the distal toe of the drift, 191 km 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. Abstract Copyright (2014) Elsevier, B.V.
Year of Publication: 2014
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 03 Geochronology; 24 Surficial Geology, Quaternary Geology; Absolute age; Arctic region; Atlantic Ocean; C-14; Carbon; Cenozoic; Chemostratigraphy; Chronostratigraphy; Cores; Dates; Eirik Drift; Expedition 303; Expeditions 303/306; Foraminifera; Greenland; Holocene; IODP Site U1306; Integrated Ocean Drilling Program; Invertebrata; Isotope ratios; Isotopes; Magnetic intensity; Magnetic properties; Magnetic susceptibility; Magnetization; Magnetostratigraphy; Marine sediments; Microfossils; Natural remanent magnetization; North Atlantic; Northwest Atlantic; O-18/O-16; Oxygen; Paleomagnetism; Pleistocene; Protista; Quaternary; Radioactive isotopes; Remanent magnetization; Sediments; Southwestern Greenland; Stable isotopes; TEM data; Upper Pleistocene
Coordinates: N581400 N581400 W0453800 W0453900
Record ID: 2015012688
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands