Giant Submarine Landslide on the East Antarctic Margin During the Plio-Pleistocene

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中文题名南极东部边缘在上新世-更新世期间发生的巨型海底滑坡
作者Xiaoxia Huang;Laura De Santis;German Leitchenkov;Carlota Escutia;Flavio Accaino;Morelia Urlaub;Robert M. McKay
作者单位Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, ChinaX. Huang,Contribution: Conceptualization, Methodology, Software, Validation, Formal analysis, ​Investigation, Writing - original draft, Writing - review & editing, Visualization, Project administration, Funding acquisitionNational Institute of Oceanography and Applied Geophysics, OGS, Trieste, ItalyContribution: Writing - review & editingAll Russia Scientific Research Institute for Geology and Mineral Resources of the Ocean, St. Petersburg, RussiaContribution: Writing - review & editingInstituto Andaluz de Ciencias de la Tierra, CSIC-Univ. de Granada, Armilla, SpainContribution: Writing - review & editingNational Institute of Oceanography and Applied Geophysics, OGS, Trieste, ItalyContribution: Writing - review & editingGEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, GermanyContribution: Writing - review & editingVictoria University of Wellington, Wellington, New ZealandContribution: Writing - review & editing
刊名Geophysical Research Letters
年2025
卷52
期No.13
摘要
A giant submarine landslide complex is reported on the George V margin of East Antarctic continental rise. Such landslides are imaged on seismic profiles that display evidence of basal glide planes and headwall scarps. A longitudinal seismic transect, and correlation to nearby drill sites suggest the slide was formed after the early Pliocene. To our knowledge, it is the largest submarine landslide ever identified on the Antarctic margin, with approximately 2,300 km3 of sediments evacuated from the shelf. We propose potential triggers for this slide, including weak layers, fluid and isostatic rebound following ice sheet retreat, although hypothesis relating to the processes has to be tested by direct stratigraphic data. Given the size of the landslide, an improved understanding of whether it was formed during a single event or more gradually during a prolonged interval is critical to evaluate whether Antarctic submarine geohazards may exist in a rapidly changing climates.

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