The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology
The Piedra Buena Terrace (PBT), situated in the Patagonian continental slope, is swept by the vigorous flow of Antarctic-sourced bottom water masses, and intersected by a considerable submarine canyon system. It thus represents a world-class natural laboratory to investigate the sedimentary dynamics...
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ftconicet:oai:ri.conicet.gov.ar:11336/140591 2023-10-09T21:46:22+02:00 The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology Isola, José Ignacio Bravo, María Emilia Bozzano, Graziella Palma, Fermin Ignacio Ormazabal, Juan Pablo Principi, Sebastián Spoltore, D. Martín, Rodrigo Sebastian Esteban, Federico Damián Tassone, Alejandro Alberto application/pdf http://hdl.handle.net/11336/140591 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0025322721000414 info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.margeo.2021.106459 http://hdl.handle.net/11336/140591 Isola, José Ignacio; Bravo, María Emilia; Bozzano, Graziella; Palma, Fermin Ignacio; Ormazabal, Juan Pablo; et al.; The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology; Elsevier Science; Marine Geology; 435; 106459; 5-2021; 1-14 0025-3227 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ARGENTINIAN CONTINENTAL MARGIN MIXED SYSTEMS MULTI-BEAM BATHYMETRY SEISMIC INTERPRETATION WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.margeo.2021.106459 2023-09-24T20:17:08Z The Piedra Buena Terrace (PBT), situated in the Patagonian continental slope, is swept by the vigorous flow of Antarctic-sourced bottom water masses, and intersected by a considerable submarine canyon system. It thus represents a world-class natural laboratory to investigate the sedimentary dynamics of deep-ocean settings influenced by both, along-slope, and down-slope sedimentary processes. In the framework of the Pampa Azul project, the PBT was surveyed with swath bathymetry and a high-resolution parametric sub-bottom seismic profiler and sampled at several locations with a 7 m long gravity corer. Through the integration of the acoustic data, grain size results from a sediment core and two AMS 14C ages this work attempts to: (1) describe for the first time the detailed geomorphology of a poorly known region of the Patagonian continental slope; (2) depict the principal sub-surface seismic units, illustrating their internal structure, geometry, and distribution; (3) establish a correlation between sub-surface seismic facies and sediment deposits using the first age constraints for this region; (4) propose a model with the depositional history of the PBT, focusing on the interaction between along-slope and down-slope processes and seafloor morphology. The acquired bathymetric data imaged with unprecedent detail the geomorphology of the southern part of the PBT revealing the presence of a field of kilometric-sized, sub-circular, crater-like depressions, and a submarine canyon. The analyzed seismic sub-bottom profiles showed that the shallow sedimentary structure of the study area is represented by patchy-mounded deposits characterized by three distinctive features: cyclic stacks of two seismic facies (FA and FB), mounded shape, and preferential location northwards the morphological depressions and the submarine canyon. Integration of a seismic sub-bottom profile with one sediment core indicates that the alternation of seismic facies reflects variations in the hydrodynamic conditions. FA is related to a high to ... Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Pampa ENVELOPE(-57.216,-57.216,-63.883,-63.883) Piedra Buena ENVELOPE(-62.910,-62.910,-64.308,-64.308) Marine Geology 435 106459 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ARGENTINIAN CONTINENTAL MARGIN MIXED SYSTEMS MULTI-BEAM BATHYMETRY SEISMIC INTERPRETATION WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
ARGENTINIAN CONTINENTAL MARGIN MIXED SYSTEMS MULTI-BEAM BATHYMETRY SEISMIC INTERPRETATION WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Isola, José Ignacio Bravo, María Emilia Bozzano, Graziella Palma, Fermin Ignacio Ormazabal, Juan Pablo Principi, Sebastián Spoltore, D. Martín, Rodrigo Sebastian Esteban, Federico Damián Tassone, Alejandro Alberto The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology |
topic_facet |
ARGENTINIAN CONTINENTAL MARGIN MIXED SYSTEMS MULTI-BEAM BATHYMETRY SEISMIC INTERPRETATION WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The Piedra Buena Terrace (PBT), situated in the Patagonian continental slope, is swept by the vigorous flow of Antarctic-sourced bottom water masses, and intersected by a considerable submarine canyon system. It thus represents a world-class natural laboratory to investigate the sedimentary dynamics of deep-ocean settings influenced by both, along-slope, and down-slope sedimentary processes. In the framework of the Pampa Azul project, the PBT was surveyed with swath bathymetry and a high-resolution parametric sub-bottom seismic profiler and sampled at several locations with a 7 m long gravity corer. Through the integration of the acoustic data, grain size results from a sediment core and two AMS 14C ages this work attempts to: (1) describe for the first time the detailed geomorphology of a poorly known region of the Patagonian continental slope; (2) depict the principal sub-surface seismic units, illustrating their internal structure, geometry, and distribution; (3) establish a correlation between sub-surface seismic facies and sediment deposits using the first age constraints for this region; (4) propose a model with the depositional history of the PBT, focusing on the interaction between along-slope and down-slope processes and seafloor morphology. The acquired bathymetric data imaged with unprecedent detail the geomorphology of the southern part of the PBT revealing the presence of a field of kilometric-sized, sub-circular, crater-like depressions, and a submarine canyon. The analyzed seismic sub-bottom profiles showed that the shallow sedimentary structure of the study area is represented by patchy-mounded deposits characterized by three distinctive features: cyclic stacks of two seismic facies (FA and FB), mounded shape, and preferential location northwards the morphological depressions and the submarine canyon. Integration of a seismic sub-bottom profile with one sediment core indicates that the alternation of seismic facies reflects variations in the hydrodynamic conditions. FA is related to a high to ... |
format |
Article in Journal/Newspaper |
author |
Isola, José Ignacio Bravo, María Emilia Bozzano, Graziella Palma, Fermin Ignacio Ormazabal, Juan Pablo Principi, Sebastián Spoltore, D. Martín, Rodrigo Sebastian Esteban, Federico Damián Tassone, Alejandro Alberto |
author_facet |
Isola, José Ignacio Bravo, María Emilia Bozzano, Graziella Palma, Fermin Ignacio Ormazabal, Juan Pablo Principi, Sebastián Spoltore, D. Martín, Rodrigo Sebastian Esteban, Federico Damián Tassone, Alejandro Alberto |
author_sort |
Isola, José Ignacio |
title |
The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology |
title_short |
The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology |
title_full |
The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology |
title_fullStr |
The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology |
title_full_unstemmed |
The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology |
title_sort |
late-quaternary deposits of the piedra buena terrace (patagonian continental slope, sw atlantic): an example of interaction between bottom currents and seafloor morphology |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/140591 |
long_lat |
ENVELOPE(-57.216,-57.216,-63.883,-63.883) ENVELOPE(-62.910,-62.910,-64.308,-64.308) |
geographic |
Antarctic Pampa Piedra Buena |
geographic_facet |
Antarctic Pampa Piedra Buena |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0025322721000414 info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.margeo.2021.106459 http://hdl.handle.net/11336/140591 Isola, José Ignacio; Bravo, María Emilia; Bozzano, Graziella; Palma, Fermin Ignacio; Ormazabal, Juan Pablo; et al.; The Late-Quaternary deposits of the Piedra Buena Terrace (Patagonian continental slope, SW Atlantic): An example of interaction between bottom currents and seafloor morphology; Elsevier Science; Marine Geology; 435; 106459; 5-2021; 1-14 0025-3227 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.margeo.2021.106459 |
container_title |
Marine Geology |
container_volume |
435 |
container_start_page |
106459 |
_version_ |
1779322057220161536 |