The Universidad Federal of Bahia (Brazil) has collected high resolution data using the multimode Meridata acquisition system, with a SIG Pulse S1 driving sparker & boomer sound sources. In the region of Todos os Santos Bay, a bridge connecting the city of Salvador to the Island of Itaparica is planned to be built. Before planning and performing engineering works, the geophysical investigations are essential for the stratigraphic mapping of the area. It was important to identify the top of the rocky substrate and the thickness of the recent sedimentary cover. The shallow marine reflection seismics was ideal to map the sequences of the Quaternary sediments. The rocky basement (Recõncavo Basin) was mapped also.
Isaac de Oliveira Santos1 , José Maria Landim Dominguez1 (2019) ,Mapeamento estratigráfico utilizando sísmica de alta resolução no trecho da futura Ponte Salvador-Itaparica, Bahia, Brasil, Geol.
USP, Sér. cient., São Paulo, v. 19, n. 4, p. 8-98, Dezembro 2019
High-resolution seismic records totaling 180 km were acquired using the Meridata Multi-Mode System, with a SIG Pulse S1 and boomer acoustic source operating within a frequency spectrum of 0.3 to 1.5 kHz and power between 80 and 140 J.
The new vessel of the JCG will be equipped with SIG multi-channel streamers. The first streamer delivered to JCG is already on board the R/V Shoyo, operated by the Hydrographic & Oceanographic dept of JCG.
Two other survey vessel are under construction for deployment in 2019 and 2020, both with shallow water sounding equipment installed. Toyo Corporation, SIG's rep in Japan is promoting the MC streamers. The units of JCG have 24 channels, spaced at 2.5 m with a total active section of 96 m.