PLEISTOCENE DEPOSITIONAL ENVIRONMENTS ON THE EASTERN ROSS SEA CONTINENTAL SLOPE, ANTARCTICA ...

• Main Author: King, Maxine Valentina
• Format: Article in Journal/Newspaper
• Language: English
• Published: University of Plymouth 2023
• Subjects: Ross Sea; Pleistocene; Trough-mouth fan; Turbidites; Sedimentary Process; Glacigenic Debris Flow; PhD; Antarctic; Laberg; West Antarctic Ice Sheet; Antarc*; Antarctica; Ice Sheet
• Online Access: https://dx.doi.org/10.24382/5041; https://pearl.plymouth.ac.uk/handle/10026.1/20944

One first-author publication was produced during the study period, which combines data from results Chapters 5 and 6, is detailed below: King, M. V., Gales, J. A., Laberg, J. S., McKay, R. M., De Santis, L., Kulhanek, D. K., Hosegood, P. J., Morris, A., & Expedition, I. (2022). Pleistocene depositional environments and links to cryosphere-ocean interactions on the Eastern Ross Sea continental slope, Antarctica (IODP Hole U1525A). Marine Geology, 443, 106674. doi: https://doi.org/10.1016/j.margeo.2021.106674 ... : In 2018, International Ocean Discovery Program Expedition 374 drilled a 208.28 m-thick sequence of Plio-Pleistocene sediments on the Eastern Ross Sea continental slope, Antarctica (Hole U1525A). In this thesis, sediments from Hole U1525A are used to reconstruct the depositional environment on the slope since 2.4 Ma, focusing on characterising instances of West Antarctic Ice Sheet (WAIS) extension to the continental margin. Late Pleistocene Ross Sea Fan deposits in Hole U1525A are also studied to identify provenance changes that may link to changing ice stream dynamics. Core images, grain size, X-ray fluorescence and physical properties datasets were used from the upper 121.05 m of Hole U1525A to create a detailed lithofacies scheme and depositional model since 2.4 Ma. Supporting grain size data from three legacy cores from the Glomar Challenger/JOIDES Basins were also used to aid comparison with continental shelf sediments. A total of nine lithofacies were identified: five between 2.4 – ~0.8 Ma and four ...