A refined age model and 143Nd/144Nd for the U1361A marine sediment core ...

This data set displays a refined age scale for the U1361A marine sediment core (64.41°S, 143.89°E, 3,454 m water depth), recovered from the continental rise offshore of the Wilkes Subglacial Basin, during the Integrated Ocean Drilling Program (IODP) Expedition (Escutia et al. 2011). This age scale i...

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Bibliographic Details
Main Authors: Crotti, Ilaria, Quiquet, Aurélien, Landais, Amaëlle, Stenni, Barbara, Wilson, David, Severi, Mirko, Mulvaney, Rob, Wilhelms, Frank, Barbante, Carlo, Frezzotti, Massimo
Format: Dataset
Language:English
Published: PANGAEA 2022
Subjects:
Antarctica
chronology
Sediment core
DEPTH, sediment/rock
Age model
Neodymium-143/Neodymium-144 ratio
Drilling/drill rig
Exp318
Joides Resolution
Antarc*
ice core
Online Access:https://dx.doi.org/10.1594/pangaea.941897
https://doi.pangaea.de/10.1594/PANGAEA.941897
Description
Summary:This data set displays a refined age scale for the U1361A marine sediment core (64.41°S, 143.89°E, 3,454 m water depth), recovered from the continental rise offshore of the Wilkes Subglacial Basin, during the Integrated Ocean Drilling Program (IODP) Expedition (Escutia et al. 2011). This age scale is a refined version of the age scale published in Wilson et al. 2018. Here we use the AICC2012 ice core chronology as a reference curve in order to compare the late Pleistocene sediment core data from U1361A to the TALDICE ice core record. Specifically, we refine the existing U1361A age model through the alignment of barium/aluminium (Ba/Al) ratios from XRF-scanning7 with the EDC δD record on the AICC2012 age scale. We apply a conservative tuning strategy to align the two records, using tie points (derived by visual matching) only at the mid-points of the major glacial terminations I-V. Over the interval of interest for the present study (i.e. ~100-350 ka), the new age model for core U1361 differs by only 0 to 6 ... : 2 s.e. = internal precision (2s level) on sample measurement 2 s.d. = external reproducibility estimated from the within-session standard deviation (2s.d.) on JNdi-1 standards Over the course of the analyses, measurements of rock standard BCR-2 gave 143Nd/144Nd = 0.512640 ± 0.000016 (n=31)IBRD (ire rafted debris) and 143Nd/144Nd records of the U1361A sediment core (Wilson et al. 2018) drawn of the refined age scale tuned on the AICC2012 chronology for EDC (Bazin et al. 2013) ...

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