BUSCADOR RECOLECTA

TOPOMED-GASSIS_LEG1 Cruise (29SG20111003) carried out on the Research Vessel Sarmiento de Gamboa in 2011, The TOPOMED is a Collaborative Research Project is based in the characterization of the lithospheric structure of the Gibraltar Arc region, including the Gulf of Cadiz and Alboran Sea, and the syudy of the resulting effects in the relief. Within the TOPOMED national project, GASSIS (Gibraltar Arc System Seismic Investigations Survey) is the first of two cruises that will be carried out in the South Iberian Margin. The TOPOMED-GASSIS cruise has been has been successfully accomplished onboard the R/V Sarmiento de Gamboa, from the 3rd to the 17th October (Leg 1) leaded by E. Gràcia and R. Bartolomé (UTM-CSIC) and from 18th to 29th October (Leg 2) leaded by C.R. Ranero (ICREA/ICM-CSIC). In addition to the seismic imaging of active faults and large structures of the South Iberian Margins, the TOPOMED-GASSIS cruise also included the implementation of new cutting edge marine seismic instrumentation (> 3.7 km streamer). Thus, Leg 1 team departed from Vigo on the 27th September and tests along the Galician and Huelva coasts were carried out until the 2nd October included. The tests included the deployment and recovery operations of a 5.3 km streamer and one seismic array of > 3000 c.i. Two test lines were shot and quality control was carried out by the Leg 1 scientific party. Failures detected (i.e. low winch speed and problems with the winch break) were solved on board before the start of the cruise with the help of a specialized engineer who embarked for a day. The main aim of the cruise is to characterize the crustal and upper mantle structure of the South Iberian Margin. We focused on: a) the investigation of shallow processes (i.e. active faults, fluid venting, mass fluxes) and b) the imaging and characterization of the deep crustal and mantle structure of the area. These objectives could only be achieved by using the acoustic and new MCS instrumentation of the Spanish RV Sarmiento de Gamboa, which has provided unprecedented quality of data in the region. The data will permit to efficiently attenuate the seafloor multiple energy, and to use state of the art processing and imaging techniques to obtain the deep tectonic structure of the margin. To accomplish this goal we have used up to two high volume G-gun arrays and up to 6 km long Sercel multichannel digital streamer (480 channels) towed behind the vessel at a survey speed of 4.5-5 knots. Simultaneously to the seismic survey, we have used the hull mounted swath-bathymetry system to map unsurveyed areas, the hull mounted sub-bottom profiler Parasound to image the shallow sediments 0-100 m below the seafloor, a hull-mounted gravimeter and a shallowtowed magnetometer

TOPOMED-GASSIS_LEG2 Cruise (29SG20111018) carried out on the Research Vessel Sarmiento de Gamboa in 2011, The TOPOMED is a Collaborative Research Project is based in the characterization of the lithospheric structure of the Gibraltar Arc region, including the Gulf of Cadiz and Alboran Sea, and the study of the resulting effects in the relief. Within the TOPOMED national project, GASSIS (Gibraltar Arc System Seismic Investigations Survey) is the first of two cruises that will be carried out in the South Iberian Margin. The TOPOMED-GASSIS cruise has been has been successfully accomplished onboard the R/V Sarmiento de Gamboa, from the 3rd to the 17th October (Leg 1) leaded by E. Gràcia and R. Bartolomé (UTM-CSIC) and from 18th to 29th October (Leg 2) leaded by C.R. Ranero (ICREA/ICM-CSIC). In addition to the seismic imaging of active faults and large structures of the South Iberian Margins, the TOPOMED-GASSIS cruise also included the implementation of new cutting edge marine seismic instrumentation (> 3.7 km streamer). Thus, Leg 1 team departed from Vigo on the 27th September and tests along the Galician and Huelva coasts were carried out until the 2nd October included. The tests included the deployment and recovery operations of a 5.3 km streamer and one seismic array of > 3000 c.i. Two test lines were shot and quality control was carried out by the Leg 1 scientific party. The main aim of the cruise is to characterize the crustal and upper mantle structure of the South Iberian Margin. We focused on: a) the investigation of shallow processes (i.e. active faults, fluid venting, mass fluxes) and b) the imaging and characterization of the deep crustal and mantle structure of the area. These objectives could only be achieved by using the acoustic and new Multi Channel Seismic instrumentation of the Spanish RV Sarmiento de Gamboa, which has provided unprecedented quality of data in the region. The data will permit to efficiently attenuate the seafloor multiple energy, and to use state of the art processing and imaging techniques to obtain the deep tectonic structure of the margin. To accomplish this goal we have used up to two high volume G-gun arrays and up to 6 km long Sercel multichannel digital streamer (480 channels) towed behind the vessel at a survey speed of 4.5-5 knots. Simultaneously to the seismic survey, we have used the hull mounted swath-bathymetry system to map unsurveyed areas, the hull mounted sub-bottom profiler Parasound to image the shallow sediments 0-100 m below the seafloor, a hull-mounted gravimeter and a shallow towed magnetometer

GEOMARGEN Cruise (29SG20111031) carried out on the Research Vessel Sarmiento de Gamboa in 2011, Seismic reflection Images, wide-angle seismic velocity models, and magnetoteluric structure of the Gibraltar Arc system: A geological interpretation of the geodynamic origin of Gulf of Cadiz imbricated wedge, the Alborán basin, and the South-Balearic basin. Tectonic Structure of the Imbricated Wedge of the Gulf of Cadiz (Gibraltar Arc) revealed from new seismic images of the Geomargen-I cruise

MAEC-GAIRE Cruise (29SG20111128) carried out on the Research Vessel Sarmiento de Gamboa in 2011, Geophysical study for the Extension of the Spanish Continental Shelf beyond 200 nautical miles west off Canary Islands & Geophysical study of the undersea active volcano of El Hierro Island. During the MAEC-GAIRE cruise, A total length of 4.471 km. of lines using multichannel seismic reflection, multibeam echo-sounder Atlas HYDROSWEEP DS, echo-sounders SIMRAD EA 600 and EK-60, parametric echo-sounder PARASOUND P-35 and gravimeter along the extended continental shelf of Spain west off Canary Island have been made. In the El Hierro Island a total length of 425 km. of lines using multibeam bathymetry, parametric echo-sounder and gravimeter were acquired, 162.9 km. with multichannel seismic reflection system (SM) and 75.8 km.of high angle seismic refrection

BIOCANT-1 Cruise (29SG20120301) carried out on the Research Vessel Sarmiento de Gamboa in 2012, The general objective of the project is twofold. In the first place, the aim is to understand the effects of the existing teleconnections between the Cantabrian Sea and the North-Western Mediterranean Sea and their impacts on the deep ecosystem, both pelagic and benthic. And second, to know how the transfer of the signal from external forcings to the deep ecosystem determines the structure of the community and population dynamics, thus affecting the living resources of greater commercial interest. Objective of the cruise: To install 6 moorings in the Avilés Canyon region. During the cruise lines equipped with current meters, mini-CTDs and automatic particle traps were deployment, which will collect the materials that sink from the surface area to the seabed, several thousand meters deep. In addition, samples of benthos and plankton were taken in order to reconstruct the trophic structure of the ecosystem and elucidate its functioning

GALINCLIMARCH-1 Cruise (29SG20120402) carried out on the Research Vessel Sarmiento de Gamboa in 2012, GALINCLIMARCH - Galicia Internal Basin Paleoclimatic Sedimentary Archives: Transport, Provenances, Hydrology and Reliability. The sediments of the Galician Interior Basin realm are capable of recording the peculiar conditions of the last glacial‐interglacial dynamics transition into the current interglacial and their evolution into present day, as they are influenced by the Thermohaline Circulation (THC) and because their proximity to the important continental land‐mass of western Iberia. The knowledge of the rates and magnitudes of change of this system is critical to understand its climate dynamics, processes and feedbacks, and hence its role on a local to sub‐regional scale. The inference of these climatic mechanisms encrypted in the deep‐sea sedimentary record needs to constrain the spatial and temporal scales of the sedimentary processes involved, in particular the identification of source areas, pathways and transport, storage times and hydrodynamic conditions. To adequately assess these encrypted sedimentary archives it is instrumental to identify the sedimentary expression of the main processes and forcements involved and accurately determine the spatial and temporal scales, rates and magnitudes of the processes and feedbacks that generate these records. This proposal aims to carry out a high‐resolution reconstruction of the transport time,provenance, sediment fluxes, wave climate, bottom‐current variability and post‐depositional alteration in a number of surficial samples and cores from the Galician Interior Basin. This project will provide a first insight into the relation between the last North Atlantic climate oscillation and the local regional components including abrupt climate changes (i.e. H events) and local events since the end of the last glacial period from a paleoclimatic proxies perspective. We will use a twofold approach by first constraining the current sedimentary conditions to their associated local wave climate and North Atlantic regional forcements to subsequently infer the paleoenvironmental conditions from the past 30‐50 ky sedimentary record. Firstly, analysing and modelling the present hydraulic conditions from newly acquired and historical wave climate and oceanographic records from the study area will study the current sedimentary conditions and forcements. These data will be linked to the present day sedimentation conditions by direct measurements of present day sedimentation and oceanographic conditions, supported by moored sediment traps, CTD, Doppler records and surficial samples. Epifauna, infauna, microfauna and sediment microestructure will also be studied. Subsequently we will udertake a multidisciplinary study combining high‐resolution geochemical, physical properties, environmental magnetic sediment derived records with high precision U‐series isotopes analyses in a well‐constrained geochronological framework. Further support will be provided by seismic‐acoustic data acquisition. The combination of these sedimentological, micropaleontological, geochemical and geophysical tools will help in better resolving the role of current strength, circulation and sediment provenance changes also considering across vs. along margin transport balances in the sedimentary record of the Galician Internal basin over the last 30‐50 ky

MONTERA Cruise (29SG20120423) carried out on the Research Vessel Sarmiento de Gamboa in 2012, MONTERA‐0412 scientific cruise has been conducted along two areas of the continental margins of southern Iberia: the Gulf of Cadiz and the Alboran Sea. The objective of the MONTERA coordinated project is to know the processes and mechanisms generated by seamounts located on continental margins, along with the that affect their stability and control their evolution. For this, the project covers three Main specific objectives: • The morphological and tectonic characterization of seamounts. • The stratigraphic and sedimentological characterization of the coating-sedimentary of the seamounts and adjacent areas during the Neo-Quaternary. • The establishment of evolutionary geological models in the Neogene-Quaternary

TOPOMED-GASBATS Cruise (29SG20120517) carried out on the Research Vessel Sarmiento de Gamboa in 2012, The scientific goal of the cruise is to improve our knowledge of the geodynamic evolution of the Gibraltar Arc System (GAS) from improving the existing dataset in particular margin segments of the westernmost Mediterranean. Particularly, the Miocene to Holocene tectonic evolution of the shallow crust, as determined by its deformation pattern, tectonic partitioning and kinematics, neotectonics and active tectonics. The survey was conducted in three different crustal scenarios: 1) a relatively thinned continental crust at the Palomares and Cartagena margins; 2) an anomalous or oceanic crust at the ocean-continent boundary located at the foot of theses margins, and to the east of the Alboran Basin; and 3) a highly fractured and sismogenic continental crust at the Alboran southern margin (Morocco Margin). The survey consisted in acquiring multichannel seismic profiles and concurrent, multibeam bathymetry, and magnetometer and gravimeter records

CATARINA_LEG1 Cruise (29SG20120622) carried out on the Research Vessel Sarmiento de Gamboa in 2012, CATARINA (Carbon Transport and Acidification Rates in the North Atlantic). The main objectives are to quantify the changes in circulation and ventilation of the North Atlantic water bodies and their effects on anthropogenic carbon uptake. It is also intended to evaluate the impact of current CO2 emissions based on the production and conservation of calcium carbonate in the North Atlantic, as well as the potential impact of future ocean acidification on calcareous organisms

CATARINA Leg 2 - PALEOACID Cruise (29SG20120724) carried out on the Research Vessel Sarmiento de Gamboa in 2012, he Leg 2 of CATARINA (PALEOACID) cruise aims to retrieve surface and subsurface sedimentary samples from the bottom (Box Corer, Piston Corer y Gravity Corer) of the North Atlantic at around 3000-4000 m depth in several areas currently bathed by different components of the North Atlantic Deep Water (NADW), as the Labrador Sea Water (LSW), Denmark Strait Overflow Water (DSOW) Iceland-Scotland Overflow Water (ISOW) and North-East Atlantic Deep Water (NEADW). Neighbor areas of Gibbs Fracture Zone (GFZ), the main deep passage between the West and East North Atlantic basins are considered priority places to obtain samples. It has been used an Multisensor Core Logger (MSCL) onboard and X-ray equipment that allows to obtain x-rays of the different sections of the core