Ocean basins near the Scotia–Antarctic plate boundary: Influence of tectonics and paleoceanography on the Cenozoic deposits

Maldonado, Andrés; Bohoyo, Fernando; Galindo-Zaldı́var, Jesús; Hernández-Molina, Javier; Jabaloy, A.; Lobo, F. J.; Rodrı́guez-Fernández, Jessica; Suriñach, Emma; Vázquez, J.T.

doi:10.1007/s11001-006-9003-4

Cited by 70 publications

(92 citation statements)

References 61 publications

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“…Barker et al, 1988;Larter and Barker, 1989;Dingle and Lavelle, 1998;Barker, 2001;Zachos et al, 2001;Maldonado et al, 2006;Miller et al, 2008;Smith and Anderson, 2010;Davies et al, 2012). Atmospheric pCO 2 levels decreased further and more rapidly from~930 to 400 ppm during 25-23 Ma Pagani et al, 2005;Zachos and Kump, 2005;Tripati et al, 2009Tripati et al, , 2011.…”

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 97%

“…This was followed by Oligocene sedimentation in the Powell Basin and western Scotia Sea (e.g. seismic stratigraphic units Pw5, Sh5, Maldonado et al, 2006) during the completion of the Weddell Sea opening (e.g. Bohoyo et al, 2002;König and Jokat, 2006; Table 1; Fig.…”

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 99%

“…The Eocene-Oligocene transition at~33 Ma signifies a period of several major changes: Antarctica's climate changed from warm and relatively ice-sheet free to cold and ice-covered, as temperatures decreased by about 4°C; pCO 2 declined rapidly from 1750 to 700 ppm and orbital cycles changed (Barker, 2001;Zachos et al, 2001;DeConto and Pollard, 2003;Barker and Thomas, 2004;Coxall et al, 2005;Livermore et al, 2005;Pollard and DeConto, 2009); the Antarctic Circumpolar Current (ACC) developed Gahagan, 1998, 2003;Miller et al, 2008) as the Weddell Sea and Drake Passage opened and western Scotia Sea started to open Ghidella et al, 2002;König and Jokat, 2006;Maldonado et al, 2006); ephemeral ice sheets formed the initial East Antarctic Ice Sheet (EAIS) and West Antarctic Ice Sheet (WAIS) on higher elevations Barker et al, 1988;Miller et al, 1990;Oszko, 1997;Barker, 2001) as well as small ice-caps on the northern Antarctic Peninsula Smith and Anderson, 2010;.…”

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 99%

“…Haq and Schutter, 2008) and ocean bottom water circulation intensified between the Weddell and Scotia Seas as the ACC system developed fully (e.g. Maldonado et al, 2006).…”

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 99%

“…Sediment unit prefixes: S = Scotia Sea, Pr = Protector Basin, Sh = near Shackleton Ridge, Pw = Powell Basin, SOM = South Orkney Microcontinent, J = Jane Basin, SH = SHALDRIL II James Ross Basin, WD = northwestern Weddell Sea, W = southeastern Weddell Sea; pCO 2 ppm = partial pressure atmospheric CO 2 in parts per million. References: 1 2 Smith & Anderson, 2010 3 Busetti et al, 2000;4 Maldonado et al, 2006;5 Larter & Barker, 1989;6 Larter & Cunningham, 1993;7 Barker et al, 1988; 8 Rogenhagen et al, 2004;9 Miller et al, 1990;10 BAS, 1985;11 Maldonado et al, 2000;12 Livermore et al, 2000;13 Haq & Schutter, 2008;14 Bart et al, 2005;15 Tripati et al, 2009Tripati et al, , 201116 Pagani et al, 2005;17 Bart et al, 2005;18 Zachos et al, 2001;19 Maldonado et al, 2007;20 Eagles et al, 2005;21 Bohoyo et al, 2002;22 Bohoyo, 2004;23 24 Table 1 Deposition of seismic stratigraphic units in the Weddell and Scotia Seas during changes in tectonics, glaciation, climate and ocean circulation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

et al. 2013

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Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 97%

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 99%

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 99%

“…Haq and Schutter, 2008) and ocean bottom water circulation intensified between the Weddell and Scotia Seas as the ACC system developed fully (e.g. Maldonado et al, 2006).…”

Section: Tectonic Palaeoceanographic and Palaeoclimate Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

et al. 2013

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Slowdown of Circumpolar Deepwater flow during the Late Neogene: Evidence from a mudwave field at the Argentine continental slope

Gruetzner

Uenzelmann-Neben

Franke

et al. 2014

Geophys. Res. Lett.

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Geochemical evidence from boreholes suggests enhanced transport of Northern Component Water (NCW) to southern latitudes from about 6 Ma onward. However, information on how this change in transport influenced the intensity and position of current systems is sparse. Here we use seismic reflection profiles interpreted together with bathymetric data to investigate current derived deposits at the central Argentine Margin. Upslope migrating mudwaves overlying a late Miocene erosional unconformity provide evidence that Circumpolar Deepwater flow slowed down with the onset of NCW inflow. During the last 3 Ma, changes in dimensions and migration rates of the waves are small indicating continuous bottom current flow conditions similar to today with only minor variations in flow speed, suggesting that the Deep Western Boundary Current in the western south Atlantic as observed today has been a pervasive feature of the global thermohaline circulation system during the Plio-/Pleistocene.

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Tectonic activity evolution of the Scotia‐Antarctic Plate boundary from mass transport deposit analysis

et al. 2016

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The spatial distribution and temporal occurrence of mass transport deposits (MTDs) in the sedimentary infill of basins and submerged banks near the Scotia‐Antarctic plate boundary allowed us to decode the evolution of the tectonic activity of the relevant structures in the region from the Oligocene to present day. The 1020 MTDs identified in the available data set of multichannel seismic reflection profiles in the region are subdivided according to the geographic and chronological distributions of these features. Their spatial distribution reveals a preferential location along the eastern margins of the eastern basins. This reflects local deformation due to the evolution of the Scotia‐Antarctic transcurrent plate boundary and the impact of oceanic spreading along the East Scotia Ridge (ESR). The vertical distribution of the MTDs in the sedimentary record evidences intensified regional tectonic deformation from the middle Miocene to Quaternary. Intensified deformation started at about 15 Ma, when the ESR progressively replaces the West Scotia Ridge (WSR) as the main oceanic spreading center in the Scotia Sea. Coevally with the WSR demise at about 6.5 Ma, increased spreading rates of the ESR and numerous MTDs were formed. The high frequency of MTDs during the Pliocene, mainly along the western basins, is also related to greater tectonic activity due to uplift of the Shackleton Fracture Zone by tectonic inversion and extinction of the Antarctic‐Phoenix Ridge and involved changes at late Pliocene. The presence of MTDs in the southern Scotia Sea basins is a relevant indicator of the interplay between sedimentary instability and regional tectonics.

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Ocean basins near the Scotia–Antarctic plate boundary: Influence of tectonics and paleoceanography on the Cenozoic deposits

Cited by 70 publications

References 61 publications

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

Slowdown of Circumpolar Deepwater flow during the Late Neogene: Evidence from a mudwave field at the Argentine continental slope

Tectonic activity evolution of the Scotia‐Antarctic Plate boundary from mass transport deposit analysis

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