The TOPOMED-FREEZE campaign was organized as a joint campaign of the TOPOMED and FREEZE projects sponsored by the Fundação para a Ciência e a Tecnologia (FCT) (Plate reorganization in the western Mediterranean: lithospheric causes and topographic consequences, TOPOEUROPE/0001/2007; Submarine FREshwater dischargEs: characteriZation and Evaluation study on their impact on the Algarve coastal ecosystems, PTDC/MAR/102030/2008). These two projects share complementary study areas and objectives. The first concentrates on the effects of neotectonics on the evolution of landscape and environments and the second on the investigation of Submarine Fresh-Water Discharges.
The ASTARTE 2014 seismic campaign aims extending the area of previous seismic surveys to a distance of around 20 nautical miles from the coast till the edge of the continental shelf. The survey plan was made for acquisition of 24 profiles divided in two classes: the in-line class perpendicular to the coastline and the cross-line class orthogonal to the in-line lines. The main reason for selecting the offshore Quarteira region is because this region is a target for tsunami in prints on the continental shelf although the entire Algarve coast can be a repository of past tsunami geologic records.
This project aims to characterize the evolution of the coastline during the Quaternary and discern what were the contributions to this evolution: 1) neotectonic, 2) eustatic variations and 3) sedimentary transport; for this purpose was selected as study area the coastal stretch between Cabo da Roca (~ 38 46'N) and the village of Comporta (~ 38 20'N).
The FREEZE 2010 geophysical cruise was planned to acquire a detailed bathymetry just off Olhos d'Agua, high resolution seismic and Side Scan Sonar data in order to investigate and define the geological and the tectonic settings off Olhos d'Agua (Algarve coast, South Portugal) and to find any possible evidence of supposed existing submarine groundwater discharges (SGDs) in this area.
The ERSTA project intended to study the seismogenic and tsunamigenic bodies and prepare an sismotectonic model for the Algarve region. For this project, in this campaign, was intend to carry out a geophysical survey that will contribute to a more detailed characterization, in the offshore region, of São Marcos-Quarteira and Carcavai faults. The SANDEX project aims to evaluate the physical impact from the extraction of sand and gravel in the coastal sediment balance and evolution of the coastline. The campaign aims to collect bathymetric data that will contribute to monitoring of the impact caused by the exploitation of sand deposits carried off the Quarteira as well as for the assessment of sediment budget of the study area.
The Tagusdelta campaign had technical and scientific objectives. The main technical objective was to make the proof of concept of the new proposed method for the acquisition of 3D very high resolution seismic reflection data. The accomplishment of this objective included: deployment and data acquisition systems tests; positioning uncertainty assessment; seismic and positioning data processing for the 3D seismic volume generation. From the scientific point of view the main objective was to acquire very high resolution seismic reflection data that allow the characterization of the frontal area of the Tagus ebb-tide delta seismic stratigraphic facies arquitecture. A special focus was placed in the: identification, characterization and mapping of mass wasting features, in order to allow a first trial of the Pleisto-Holocene mapping and chronostratigraphy of these features in the Tagus delta; imaging the morphologies of landslide structures with 3D seismic, particularly in what concerns the landslide already identified with the previous data, to allow the quantification and precise location of the events, to generate data of unprecedented realism that can be fed into the tsunamigenic mathematical models.