Meters composite depth (mcd) versus oxygen isotope measurements on Neogloboquadrina pachyderma from Integrated Ocean Drilling Program (IODP) Site U1306

The data comprise meters composite depth (mcd) versus oxygen isotope measurements on Neogloboquadrina pachyderma from Integrated Ocean Drilling Program (IODP) Site U130 using a Fisons Optima mass spectrometer at Rutgers University (see Channell et al., 2014). Planktic oxygen isotope (δ18O) and relat...

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Bibliographic Details
Main Authors: Channell, James E T, Wright, James D, Mazaud, Alain, Stoner, Joseph S
Format: Dataset
Language:English
Published: PANGAEA 2021
Subjects:
303-U1306
COMPCORE
Composite Core
Deep Western Boundary Current
DEPTH
sediment/rock
Eirik Drift
Exp303
Joides Resolution
Mass spectrometer Fisons Optima
Neogloboquadrina pachyderma
δ18O
North Atlantic
North Atlantic Climate 1
Northwest Atlantic
Oxygen isotopes
Quaternary
relative paleointensity
Greenland
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.926659
https://doi.org/10.1594/PANGAEA.926659
Description
Summary:The data comprise meters composite depth (mcd) versus oxygen isotope measurements on Neogloboquadrina pachyderma from Integrated Ocean Drilling Program (IODP) Site U130 using a Fisons Optima mass spectrometer at Rutgers University (see Channell et al., 2014). 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/kyr) 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.

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