Seismic stratigraphy and tectonics of the northwestern Weddell Sea (Antarctica) inferred from marine geophysical surveys

Miocene to Recent contourite drifts development in the northern Weddell Sea (Antarctica)

“…The oceanic seafloor west of 478W is of Mesozoic age and is mostly uniform, with no magnetic anomalies and only regular gravimetric gradients (LaBrecque et al, 1986(LaBrecque et al, , 1989Kavoun and Vinnikovskaya, 1994;Livermore and Hunter, 1996). The abyssal plain of the eastern province, in contrast, is disrupted by linear, slightly arched fracture zones with a WNW-ESE orientation ( Figs.…”

Tectonic reconstructions for paleobathymetry in Drake Passage

“…Simply adopting different angles about Smalley et al's (2007) pole sets up a difficult-to-justify trade off between this overlap and another one between the central Scotia and Antarctic plates on the South Scotia Ridge. Instead, we link the reconstruction elements with an ad hoc central Scotia-Antarctica rotation that is designed to avoid overlap and underlap between Tierra del Fuego and the Phoenix Plate, and reproduce the slow and slightly transpressional strain on the South Scotia Ridge that interpretations of seismic profiles suggest it may have accommodated (Galindo-Zaldívar et al, 1996;Kavoun and Vinnikovskaya, 1994;Lodolo et al, 2010). Fig.…”

Current-controlled sedimentation in the north-western Weddell Sea

“…The study is based on the multichannel data collected in 2018 by the Russian Antarctic Expedition (RAE) using the RV "Akademic A. Karpinsky", as well as data from Italian, Spanish, British and Japanese expeditions, available from the Antarctic Seismic Data Library (SDLS, https://sdls.ogs.trieste.it). Additionally, paper copies of seismic sections acquired in 1990 by the Marine Arctic Geological Expedition [17] were used for joint interpretation.…”