TY - JOUR
T1 - Oceanographic and climatic consequences of the tectonic evolution of the southern scotia sea basins, Antarctica
AU - Pérez, Lara F.
AU - Hernández-Molina, F. Javier
AU - Lodolo, Emanuele
AU - Bohoyo, Fernando
AU - Galindo-Zaldívar, Jesus
AU - Maldonado, Andrés
N1 - Funding Information:
The first author of this manuscript benefices of the Marie Skłodowska-Curie Action (MSCA) Global Fellowship H2020-MSCA-IF-GF-2017 no.: 792773 WAMSISE. This work was funded through the Spanish National Research Program projects CTM2011-30241-C01/02ANT and CTM2014-60451-C2-1/2 , the special action CTM2011-13970-E, and is related to the project CTM2012-39599-C03. This work was also partially supported by the COMPASS consortium and performed in collaboration with the Continental Margins Research Group (CMRG) and The Drifters Research Group at Royal Holloway University of London (UK) . We thank the Antarctic Seismic Data Library System for access to some of the data interpreted in this study. Our acknowledge to Dr. Gerhard Kuhn (Alfred-Wegener-Institut) and the anonymous reviewer that highly improve the initial version of this manuscript.
Funding Information:
The first author of this manuscript benefices of the Marie Sk?odowska-Curie Action (MSCA) Global Fellowship H2020-MSCA-IF-GF-2017 no.: 792773 WAMSISE. This work was funded through the Spanish National Research Program projects CTM2011-30241-C01/02ANT and CTM2014-60451-C2-1/2, the special action CTM2011-13970-E, and is related to the project CTM2012-39599-C03. This work was also partially supported by the COMPASS consortium and performed in collaboration with the Continental Margins Research Group (CMRG) and The Drifters Research Group at Royal Holloway University of London (UK). We thank the Antarctic Seismic Data Library System for access to some of the data interpreted in this study. Our acknowledge to Dr. Gerhard Kuhn (Alfred-Wegener-Institut) and the anonymous reviewer that highly improve the initial version of this manuscript.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11
Y1 - 2019/11
N2 - The Scotia Sea is a complex geological area located in the Southern Ocean which evolution is closely linked to the opening of the Drake Passage. Structural highs of continental nature derived from the former continental bridge between South America and the Antarctic Peninsula surround the abyssal plains of the Scotia Sea, restricting small isolated sedimentary basins along its southern margin. Morpho-structural and seismo-stratigraphic analyses of multichannel seismic reflection profiles, and additional geophysical data available in the region, have been conducted, decoding regional and global implications of the basins' evolution. The main aim of this work is to describe the stratigraphic evolution of the southern Scotia Sea basins, from their opening in the back-arc tectonic context of the Scotia Sea, to the last oceanographic changes which have carried on global climatic implications. The evolution of the south Scotia Sea occurred through two major tectonic stages registered in the sedimentary record of the region: 1) the end of the subduction in the northwest part of the Weddell Sea during the early Miocene, which shortened the back-arc subduction trench generating a major change in the regional tectonic field that determined the evolution of the southern basins towards two different types of passive margins: magma-poor and magma-rich; and 2) the full development of the southern Scotia Sea basins during the middle Miocene, that led to the opening of deep oceanic gateways along the South Scotia Ridge. Interplay among tectonics, oceanography and climate is proposed to control the regional sedimentary stacking pattern, with coeval changes globally identified.
AB - The Scotia Sea is a complex geological area located in the Southern Ocean which evolution is closely linked to the opening of the Drake Passage. Structural highs of continental nature derived from the former continental bridge between South America and the Antarctic Peninsula surround the abyssal plains of the Scotia Sea, restricting small isolated sedimentary basins along its southern margin. Morpho-structural and seismo-stratigraphic analyses of multichannel seismic reflection profiles, and additional geophysical data available in the region, have been conducted, decoding regional and global implications of the basins' evolution. The main aim of this work is to describe the stratigraphic evolution of the southern Scotia Sea basins, from their opening in the back-arc tectonic context of the Scotia Sea, to the last oceanographic changes which have carried on global climatic implications. The evolution of the south Scotia Sea occurred through two major tectonic stages registered in the sedimentary record of the region: 1) the end of the subduction in the northwest part of the Weddell Sea during the early Miocene, which shortened the back-arc subduction trench generating a major change in the regional tectonic field that determined the evolution of the southern basins towards two different types of passive margins: magma-poor and magma-rich; and 2) the full development of the southern Scotia Sea basins during the middle Miocene, that led to the opening of deep oceanic gateways along the South Scotia Ridge. Interplay among tectonics, oceanography and climate is proposed to control the regional sedimentary stacking pattern, with coeval changes globally identified.
KW - Antarctica
KW - Drake Passage and Scotia Sea
KW - Isolated oceanic basins
KW - Paleoceanography
KW - Passive margins
KW - Seismic stratigraphy
UR - http://www.scopus.com/inward/record.url?scp=85071879894&partnerID=8YFLogxK
U2 - 10.1016/j.earscirev.2019.102922
DO - 10.1016/j.earscirev.2019.102922
M3 - Article
AN - SCOPUS:85071879894
SN - 0012-8252
VL - 198
JO - Earth-Science Reviews
JF - Earth-Science Reviews
M1 - 102922
ER -
