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Hydrodynamic and Geomorphological control of mud deposits in the inner continental shelf (Peruíbe - Sao Sebastiao sector, Southeastern of Brazil)

Grant number: 15/16067-2
Support type:Regular Research Grants
Duration: August 01, 2016 - July 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Oceanography - Geological Oceanography
Principal researcher:Javier Alcántara Carrio
Grantee:Javier Alcántara Carrio
Home Institution: Instituto Oceanográfico (IO). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers: Angela Fontan Bouzas ; Antonio Henrique da Fontoura Klein ; Billy Julie Céline Andrée ; Isabel Montoya Montes ; Ivan Dario Correa Arango ; João Thadeu de Menezes ; Juan Antonio Morales González ; Juan Felipe Paniagua Arroyave ; Luana Carla Portz ; Luigi Jovane ; Luiz Antonio Pereira de Souza ; Michel Michaelovitch de Mahiques ; Paula Prado Cabillas ; Rogério Portantiolo Manzolli ; Rui Pires de Matos Taborda ; Silvia Albarracín González


The origin, distribution, and fate of the mud deposits located within the inner continental shelf of the state of São Paulo constitute important research topics not explored yet. The sedimentation processes, particularly the current mud distribution among this region may be controlled not only by the hydrodynamics, but also by the geomorphology as a result of the interaction of external (continental, littoral and marine) and internal (tectonic and structural) geological processes. The objective is, therefore, to identify the evidences of hydrodynamic, geomorphic and structural controls on the mud deposits within the inner continental shelf between Peruíbe and São Sebastiao. Two oceanographic campaigns will be conducted on board of the Alpha Delphini vessel to collect the necessary data to test the hypothesis. The hydrodynamics will be obtained by numerical modelling of from waves, tides, wind-induced currents and associated mud transport, and their calibration and validation with in situ mud transport measurements. Submarine topography will be obtained from the analysis of available bathymetric data and from several measurements using a multibeam echosounder. In addition, the collection of seismic profiles will provide insights regarding the stratigraphy and recent geomorphologic evolution, especially focusing on the identification and description of possible prograding-wedge-related deposits. The cartography of surficial sediments facies will be obtained based on side-scan sonar data in combination with the analysis of surficial sediment samples. Additionally, several sediment cores will be taken to calculate the age, sedimentation rate and recent evolution of the mud deposits. In that regard, the mineralogy and chemical analysis of the deposits will serve not only to identify their source area, but also to corroborate the contribution of the Santos estuary to the inner-shelf sediment load and the possible presence of anthropic-related pollution signal originated in Santos harbor. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ALCANTARA-CARRIO, JAVIER; MAHIQUES, MICHEL M.; CAZZOLI Y GOYA, SAMARA; FONTAN-BOUZAS, ANGELA. Sedimentary dynamics of a subtropical tidal flat sheltered inside a coastal channel (Araca Bay, SE Brazil). OCEAN & COASTAL MANAGEMENT, v. 164, n. SI, p. 32-41, OCT 1 2018. Web of Science Citations: 4.
ALCANTARA-CARRIO, JAVIER; DINKEL, THAYA M.; PORTZ, LUANA; MAHIQUES, MICHEL M. Two new conceptual models for the formation and degradation of baymouth spits by longshore drift and fluvial discharge (Iguape, SE Brazil). EARTH SURFACE PROCESSES AND LANDFORMS, v. 43, n. 3, p. 695-709, MAR 15 2018. Web of Science Citations: 1.
ALCANTARA-CARRIO, JAVIER; SASAKI, DALTON KEI; DE MAHIQUES, MICHEL MICHAELOVITCH; TABORDA, RUI; PEREIRA DE SOUZA, LUIZ ANTONIO. Sedimentary constraints on the development of a narrow deep strait (Sao Sebastiao Channel, SE Brazil). GEO-MARINE LETTERS, v. 37, n. 5, p. 475-488, OCT 2017. Web of Science Citations: 11.

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