The Cosmonaut Sea Wedge

Solli, K.; Kuvaas, B.; Kristoffersen, Yngve; Leitchenkov, G.; Guseva, J.; Gandjukhin, V.

doi:10.1007/s11001-008-9045-x

Cited by 12 publications

(2 citation statements)

References 35 publications

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“…13A) (Hernández‐Molina et al ., 2017; O'Brien et al ., 2020; Rodrigues et al ., 2022a). The sedimentary system formed by the interaction between turbidity currents and oceanic processes is characterized by widespread sedimentary deposition in the middle and lower courses of canyons (Rebesco et al ., 2007; Solli et al ., 2008; Huang et al ., 2020). The resulting hybrid contourite drifts are among the most extensive sedimentary bodies in the world's oceans (Fig.…”

Section: Discussionmentioning

confidence: 99%

Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica

et al. 2023

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Active continental margins are tectonic sites with complex sedimentary processes. Tectono-sedimentary interactions occur over geological time and determine the modern morphology of the margin. However, such interactions have been poorly documented in high-latitude regions. This study focuses on deep-water sedimentary systems on the South Shetland convergent margin, which is the only remaining active continental margin in Antarctica. Numerous gullies, 20 canyons and three contourite drifts are identified by interpreting bathymetry, oceanography and reflection seismic data. Heavy mineral contents of a gravity core, located at a downslope elongated mounded drift, show the asynchronous interplay of downslope and alongslope processes. The rest of the margin is dominated by turbidity currents. Variations in the slope gradient control thalweg profiles and sinuosity of canyons. Tectonic-related morphology restricts the distribution of contourite drifts. Earthquakes triggered by underplating and tectonic compression may induce slope instability at the lower flank of the plastered drift. Tectonic uplift influences the amount of sediments transported by ice sheets and controls the shelf stacking pattern. The mixed turbidite-contourite system transitions to separated canyon and drift systems from passive to active continental margins under the influence of the tectonic-related morphology. A systematic comparison has been made among several convergent margins with similar tectonic settings. Results suggest that submarine canyons on these shelf-slope systems have similar morphological features and are comparable in size. Coarse sediment input and steep continental slopes (mean slope 7 to 10°) control the canyon morphology on these margins. Therefore, this research has important implications for furthering the current understanding of sedimentary systems on high-latitude convergent margins and tectono-sedimentary interactions.

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Section: Discussionmentioning

confidence: 99%

Deep‐water sedimentary systems and tectono–sedimentary interactions on the oblique convergent margin in Antarctica

et al. 2023

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“…The influence of a conductive layer immediately under the seafloor 245We next examined the influence of a conductive layer immediately under the 246 seafloor. This conductive layer is assumed to be a sediment layer, as sediment has been 247 accumulating in this basin since the Cretaceous(Solli et al, 2008). The sediment layer 248 is most likely as thick as, or thicker than, the layers inferred from seismic surveys in the 249 eastern Cosmonauts Sea (thickness, ~2 km)(Stagg et al, 2004), on account of the 250 potentially high sediment deposition rates in the western Cosmonauts Sea(Solli et al, 251 2008).…”

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confidence: 99%