Miocene to present oceanographic variability in the Scotia Sea and Antarctic ice sheets dynamics: Insight from revised seismic-stratigraphy following IODP Expedition 382 ...

Scotia Sea and the Drake Passage is key towards understanding the development of modern oceanic circulation patterns and their implications for ice sheet growth and decay. The sedimentary record of the southern Scotia Sea basins documents the regional tectonic, oceanographic and climatic evolution s...

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Bibliographic Details
Main Authors: Pérez, Lara F., Martos, Yasmina M., García, Marga, Weber, Michael E., Raymo, Maureen E., Williams, Trevor, Bohoyo, Fernando, Armbrecht, Linda, Bailey, Ian, Brachfeld, Stefanie, Glüder, Anna, Guitard, Michelle, Gutjahr, Marcus, Hemming, Sidney, Hernandez-Almeida, Ivan, Hoem, Frida S., Kato, Yuji, O’Connell, Suzanne, Peck, Victoria L., Reilly, Brendan, Ronge, Thomas A., Tauxe, Lisa, Warnock, Jonathan, Zheng, Xufeng, IODP Expedition 382 Scientists
Format: Text
Language:English
Published: ETH Zurich 2021
Subjects:
Drake Passage
Scotia Sea
IODP Expedition 382
oceanic gateways
Antarctic ice sheets evolution
core-log-seismic correlation
Antarctic
Pirie
Antarc*
Ice Sheet
Online Access:https://dx.doi.org/10.3929/ethz-b-000457285
http://hdl.handle.net/20.500.11850/457285
Description
Summary:Scotia Sea and the Drake Passage is key towards understanding the development of modern oceanic circulation patterns and their implications for ice sheet growth and decay. The sedimentary record of the southern Scotia Sea basins documents the regional tectonic, oceanographic and climatic evolution since the Eocene. However, a lack of accurate age estimations has prevented the calibration of the reconstructed history. The upper sedimentary record of the Scotia Sea was scientifically drilled for the first time in 2019 during International Ocean Discovery Program (IODP) Expedition 382, recovering sediments down to ∼643 and 676 m below sea floor in the Dove and Pirie basins respectively. Here, we report newly acquired high resolution physical properties data and the first accurate age constraints for the seismic sequences of the upper sedimentary record of the Scotia Sea to the late Miocene. The drilled record contains four basin-wide reflectors – Reflector-c, -b, -a and -a' previously estimated to be ∼12.6 Ma, ... : Earth and Planetary Science Letters, 553 ...

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