Abstract:
The Santo Antonio Bank (SAB) is a positive feature of the Inner Continental Shelf of Salvador, adjacent to the entrance of the Todos os Santos Bay. Some studies have indicated its potential use as a deposit of siliciclastic sediments for the nourishment of urban beaches in Salvador. However, the methods that have been applied so far have not been able to determine the volume of sediments stored in this feature. Moreover, its origin on the shelf was to determine the origin and the volume of sediments stored in this feature by means of high resolution seismic mapping (sparker operating on frequencies between 0.3 to 1.5 kHz). Three major stratigraphic units were identified: Acoustic Basement, Pre-Holocene Unit and Holocene Unit. The bank originated from a paleo-high in the acoustic basement, which trapped sediments mobilized by the flood and ebb tides of the Todos os Santos bay. The volume of sandy siliciclastic sediments stored in the Holocene unit of the SAB was determined as 1 billion cubic meters, which meets with considerable ease the possible demands for urban beach nourishment and construction in the city of Salvador for over the 100 years. The sparker operating on frequencies between 0.3 to 1.5 kHz was effective for insonification to the sand sediments at depths greater than 100m below the sediment-water interface.
Reference:
MELLO, Ana Clara Coni e; DOMINGUEZ, José Maria Landin; DÜUR, Iana Carvalho; SOUZA, Luiz Antonio Pereira de. The origin of the Santo Antônio Bank: interpretation using high resolution seismic data. In: INTERNATIONAL CONGRESS OF THE BRAZILIAN GEOPHYSICAL SOCIETY, 14., 2015, Rio de Janeiro. Proceedings… 6 p.
Document is password protected, ask Customer Service/Library-DAIT/IPT. Log into BiblioInfo Bibioteca-DAIT/IPT to access the text in PDF:
https://escriba.ipt.br/pdf_restrito/173415.pdf
The Santo Antonio Bank (SAB) is a positive feature of the Inner Continental Shelf of Salvador, adjacent to the entrance of the Todos os Santos Bay. Some studies have indicated its potential use as a deposit of siliciclastic sediments for the nourishment of urban beaches in Salvador. However, the methods that have been applied so far have not been able to determine the volume of sediments stored in this feature. Moreover, its origin on the shelf was to determine the origin and the volume of sediments stored in this feature by means of high resolution seismic mapping (sparker operating on frequencies between 0.3 to 1.5 kHz). Three major stratigraphic units were identified: Acoustic Basement, Pre-Holocene Unit and Holocene Unit. The bank originated from a paleo-high in the acoustic basement, which trapped sediments mobilized by the flood and ebb tides of the Todos os Santos bay. The volume of sandy siliciclastic sediments stored in the Holocene unit of the SAB was determined as 1 billion cubic meters, which meets with considerable ease the possible demands for urban beach nourishment and construction in the city of Salvador for over the 100 years. The sparker operating on frequencies between 0.3 to 1.5 kHz was effective for insonification to the sand sediments at depths greater than 100m below the sediment-water interface.
Reference:
MELLO, Ana Clara Coni e; DOMINGUEZ, José Maria Landin; DÜUR, Iana Carvalho; SOUZA, Luiz Antonio Pereira de. The origin of the Santo Antônio Bank: interpretation using high resolution seismic data. In: INTERNATIONAL CONGRESS OF THE BRAZILIAN GEOPHYSICAL SOCIETY, 14., 2015, Rio de Janeiro. Proceedings… 6 p.
Document is password protected, ask Customer Service/Library-DAIT/IPT. Log into BiblioInfo Bibioteca-DAIT/IPT to access the text in PDF:
https://escriba.ipt.br/pdf_restrito/173415.pdf
