Morphological and sedimentary mapping of the infralittoral prograding wedge at São Sebastião island

• Grant number: 15/06884-3
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2015
• End date: May 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Oceanography - Geological Oceanography
• Principal Investigator: Isabel Montoya Montes
• Grantee: Jorge Luiz dos Passos Nascimento
• Host Institution: Instituto Oceanográfico (IO). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The project consists in processing, analyzing and interpreting geophysical data acquired in the São Sebastião region during the cruise of CUNHA project (FAPESP: 2014/08295-2), last February. Different acoustical sources were used to acquire multibeam and sidescan sonar data, as well as seismic data acquired with boomer (300 - 1000 Hz, 75 to 300 J) and chirps (2-8 kHz and 10-20 kHz - 2 kW). Moreover data from ADCP (Acoustic Doppler Current Profiler) were obtained. The processing tasks will be developed using CARIS Hips and Sips, SonarWiz da Chesapeake Technology and ArcGIS (ESRI), all of them available at IO-USP.Considering the hydrodynamic setting of the area and analyzing the geophysical data, the objective is to determine morphology, seabed typology, and the conditions required to form an infralittoral prograding wedge at São Sebastião Island. This deposit was identified during the cruise Geosedex in February 2013. In this case, monobeam (12-38 kHz) and sub-bottom profile 3,5 KHz, were acquired. The initial hypothesis consist in connecting the wedge formation with the convergence of the currents from N and S, being the São Sebastião region the area of confluence.

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)

VIEIRA, IVO; JOSE LOBO, FRANCISCO; MONTOYA-MONTES, ISABEL; SIEGLE, EDUARDO; PASSOS, JORGE LUIZ; DE MAHIQUES, MICHEL MICHAELOVITCH. A non-deltaic clinoform wedge fed by multiple sources off So Sebastio Island, southeastern Brazilian Shelf. GEO-MARINE LETTERS, v. 38, n. 1, p. 19-pg., 2018-02-01. (15/06884-3, 10/06147-5)

VIEIRA, IVO; JOSE LOBO, FRANCISCO; MONTOYA-MONTES, ISABEL; SIEGLE, EDUARDO; PASSOS, JORGE LUIZ; DE MAHIQUES, MICHEL MICHAELOVITCH. A non-deltaic clinoform wedge fed by multiple sources off So Sebastio Island, southeastern Brazilian Shelf. GEO-MARINE LETTERS, v. 38, n. 1, SI, p. 63-81, FEB 2018. (10/06147-5, 15/06884-3)