BUSCADOR RECOLECTA

The data acquisition contract was awarded to GECO-PRAKLA and took place in August-September 1993 aboard M/V Geco Sigma. Seismic data was successfully collected along the Cantabrian Margin, Galicia Margin, Iberian Abyssal Plain, the continental platform of Western Iberia, Tagus Abyssal Plain, the Gorringe Bank and Gulf of Cadiz. Data for the 240 km long line IAM-12 was acquired in February 1993 by SEISQUEST vessel of GECO-PRAKLA. The total amount of seismic reflection data collected was 3808.175 km in 19 track lines offshore. Technical specifications of the profiles: Streamer length 4800 m, Number of channels 192, Group interval 25 m, Shotpoint interval 75 m (100 m and 150 m on line IAM-2W), Source 7424 in3 (Record length 25 seconds), Sample rate 4 ms. Contact person: Torne, M., mtorne@ictja.csic.es., The Iberian Atlantic Margins (IAM) project is a multinational research programme, coordinated by the Institute of Earth Sciences of Barcelona, CSIC (Spain). It involves different academic institutions of Britain (University of Oxford and University of Durham), France (IFREMER), Portugal (University of Lisbon and Institute of Meteorology of Lisbon) and Spain (Institute of Earth Sciences of Barcelona, CSIC) and more than 40 associated scientists of European institutions attached to the main contractors. The project, financed by the European Community within its JOULE-Programme (Contract# JOU2-CT92-0177), aims to explore the deep continental and oceanic Atlantic margins of Iberia for a better understanding of the formation and evolution of Atlantic type margins, outstanding structural features and potential location of hydrocarbons and other natural resources. The project was designed to acquire deep seismic multichannel data and onshore recording of wide angle and refraction data along the North Iberian margin; the West Iberia margin, including the Galicia margin, the Iberia and Tagus abyssal plain, and the continental shelf off Portugal; and the Gorringe Bank region and Gulf of Cadiz. The experimental part of the study consisted of the acquisition of over 3700 km of near vertical incidence deep seismic multichannel reflection data. This together with wide angle reflection and refraction data recorded by land stations and OBS (Ocean Bottom Seismometers) has resulted in a full coverage in terms of crustal structure and velocity information of the study region., Peer reviewed

The data acquisition contract was awarded to ENRESA and took place in November and December 2013. Seismic data was successfully collected in the Záncara river basin (Cuenca, Spain). The total amount of seismic reflection data collected was 9.7 km in 4 high-resolution seismic reflection profiles E-W oriented. Technical specifications of the profiles: Seismometer: 10 24-channel GEODE ultra-light seismic recordes, Receiver number: 240, Receiver interval: 2 m, Source: accelerated weightdrop 250 kg and 100 kg, Source interval: 6 m, Sample rate: 1 ms, Record time: 4 s. Contact person: Carbonell, R., rcarbo@ictja.csic.es, A high-resolution 2-D seismic reflection survey was acquired to obtain a seismic image of the geological structure of the Záncara river basin (eastern Spain). The study area consists of lutites and gypsum from a Neogene sedimentary sequence. The project also targeted the geometry of the geological structure and the mechanical properties of the underground materials. In addition, this study allowed for an improvement of the geophysical acquisition technics and protocols that provided with a better resolution seismic imaging. Thus, reducing costs and improving the effectiveness of the seismic acquisition., Convenio Colaboración CSIC-ENRESA. Código CSIC: 20133830, Peer reviewed

The data acquisition contract was awarded to ENRESA and took place in January 2014. Seismic data was successfully collected in the Záncara river basin (Cuenca, Spain). This is a high-resolution seismic tomography survey to obtain a full 3-D P-wave seismic velocity image of the studied area. A regular and dense grid of 676 shots and 1200 receivers was used to image a 500 m x 500 m area of the shallow surface. A 240-channel system and a seismic source, consisting of an accelerated weight drop, were used in the acquisition. Half a million travel-time picks were inverted to provide the 3-D seismic velocity distribution up to 120 m depth. The 3-D survey was acquired in five swaths, each one consisting on five receiver lines, resulting in a total of 3380 shot gathers. Technical specifications of the profiles: Receiver number: 240, Receiver interval: 2 m, Source accelerated weightdrop: 250 kg, Source interval: 6 m, Sample rate: 1 ms, Record time: 4 s., In this repository, in addition to the seismic 3DSurvey, a resistivity model (VICANAS_3D_Res_UTM30), a lithological model (VICANAS_3D_Vp_Res_Lito_UTM30), and a training set (VICANAS_Training_set) are available. In order to improve the geological interpretation of the seismic tomography, we integrated it with the resistivity model to build a 3D lithological model. To this aim, we created a new bi-parameter grid with Vp and Res values at each node. Then, we lithologically classified the nodes using supervised learning according to a training set extracted from the wells., A high-resolution seismic tomography survey was acquired to obtain a full 3-D P-wave seismic velocity image of the Záncara river basin (eastern Spain). The study area consists of lutites and gypsum from a Neogene sedimentary sequence. The project also targeted the geometry of the underground structure with emphasis on defining the lithological contacts but also the presence of cavities and faults or fractures. An extensive drilling campaign provided uniquely tight constraints on the lithology; these included core samples and wireline geophysical measurements. The analysis of the well log data enabled the accurate definition of the lithological boundaries and provided an estimate of the seismic velocity ranges associated with each lithology. The final joint interpreted image reveals a wedge-shaped structure consisting of four different lithological units. The study features the necessary key elements to test the travel time tomographic inversion approach for the high-resolution characterization of the shallow surface. In this methodological validation test, travel-time tomography demonstrated to be a powerful tool with a relatively high capacity for imaging in detail the lithological contrasts of evaporitic sequences located at very shallow depths, when integrated with additional geological and geophysical data., Convenio Colaboración CSIC-ENRESA. Código CSIC: 20133830, Peer reviewed

Two land seismic profiles across the Betic Chain imaged the deep structure of the crust belonging to two different crustal domains. To the north, one profile samples the crust of the Variscan Iberian Massif that underlies the sedimentary cover of both the Guadalquivir foreland basin and the South Iberian crustal domain. A second profile crosses the Alpine metamorphic complexes of the Betics., Comisión Interministerial de Ciencia y Tecnología - CICYT.-- Dirección General de Investigación Científica y Técnica - DGICYT.--, Peer reviewed

The software used is LitMod2D_2.0 and can be downloaded from: https://doi.org/10.20350/digitalCSIC/9063 or GitHub https://github.com/ajay6763/LitMod2D_2.0_package_dist_users All methodological information can be found on the publication., GeoCAM (ref. PGC2018-095154-B-I00), - BestfitModel.zip: The files for best fitting model. It can be loaded by LitMod2D_2.0. - BestfitModel_No_mantle_anomalies.zip: The files for best fitting model without mantle anomalies. It can be loaded by LitMod2D_2.0. - Readme.txt., Peer reviewed

This study integrates geophysical-geochemical data to investigate the thermochemical structure of the lithosphere and sublithospheric mantle, along the Southern Tyrrhenian Basin, Apennines, Adriatic Sea, Dinarides, and Carpathians-Balkanides. We present the lithospheric structure of the Adria microplate and the two opposing mantle slabs along its NE and SW margins. The modelling shows the presence of two asthenospheric mantle wedges aligning with the Apenninic and Dinaric continental mantle slab rollback, along with cold (-200ºC) sublithospheric anomalies beneath Adria’s NE and SW margins. In the northern Adria region, the lithosphere undergoes synchronous thinning in the Tyrrhenian domain and thickening toward the forefront of the northern Apennines. This is associated with the northeastward rollback of the SW Adriatic slab, leading to subsequent delamination of the continental mantle. In the southern Adria region, the complex deep structure results from the variably oriented lithospheric slabs, and nearly 90-degree shift of the tectonic grain between the southern Apennines and the Calabrian Arc. At the SW Adria margin, beneath the northern Apennines, the thermal sublithospheric anomaly is attached to the shallower lithosphere, while a slab gap is modelled in the southern Apennines. One possibility is that the gap is due to a recent horizontal slab tear. Along the NE margin of Adria, the thermal anomaly penetrates to depths of about 200 km in the northern Dinarides and 280 km in the southern Dinarides, shallower than the SW Adria anomaly, which extends to at least 400 km depth., GeoCAM (ref. PGC2018-095154-B-I00); GEOADRIA (PID2022-139943NB-I00); (AGAUR 2021 SGR 00410);, File List: - BestfitModel.zip: The files for best fitting model with two sublithospheric anomalies (a attached slab beneath Dinarides and a slab gap beneath Apennines). It can be loaded by LitMod2D_2.0. - BestfitModel_No_mantle_anomalies.zip: The files for best fitting model without mantle anomalies. It can be loaded by LitMod2D_2.0. - Model_With_Two_attached_slabs.zip: The files for best fitting model with two attached sublithospheric anomalies (both slabs attached, no slab gap beneath Apennines). It can be loaded by LitMod2D_2.0. - Readme.txt., Peer reviewed

SedDARE-IB (Sediment Data REpository of IBeria and its continental margins) is an open access database that stores available data available data of the depth to the Base Cenozoic and Top Paleozoic stratigraphic markers. SedDARE-IB include data on onshore basins of the Iberian Peninsula (Ebro, Duero, Tajo and Gualdalquivir basins), the Lusitanian and Lower Tagus basins, and many other small basins. Offshore, SedDARE-IB comprises sedimentary data from the Atlantic Margin (Alentejo, Peniche, Northern Lusitanian Basin and deep offshore depocentres), the Gulf of Cadiz region (Algarve Basin and its surroundings) and the base of the Cenozoic marker for the Western Mediterranean Neogene basins, e.g., Valencia Trough and Alboran Basin, also comprising the acoustic basement for the rest of the Western Mediterranean region. By following the FAIR (Findable, Accessible, Interoperable and Reusable) principles of data management and having regular updates, it brings endless research and teaching opportunities to the scientific, industrial and educational communities., Sediments provide valuable information for geologists and geophysicists whenever they strive to understand, and reproduce, the geological evolution, lithology, rock properties, seismic response, and geohazards of a region. The analysis of sedimentary sequences is thus useful to the interpretation of depositional environments, sea-level change, climate change, and to a recognition of the sediments’ source areas, amongst other aspects. By integrating sedimentary data in geophysical modelling, such interpretations are improved in terms of their accuracy and reliability. To help our further understanding of Iberia’s geological evolution, geological resources and geohazards, this work presents to the scientific community the SedDARE-IB data repository. SedDARE-IB includes data on onshore basins as varied as the foreland basins of the Pyrenean-Cantabrian (Ebro and Duero basins) and Betic Cordillera (Guadalquivir Basin), the Lusitanian and Lower Tagus basins, and many other small basins. Offshore, SedDARE-IB comprises sedimentary data from the Atlantic Margin (Alentejo, Peniche, Northern Lusitanian Basin and deep offshore depocentres), the Gulf of Cadiz region (Algarve Basin and its surroundings) and the base of the Cenozoic marker for the Western Mediterranean Neogene basins, e.g., Valencia Trough and Alboran Basin, also comprising the acoustic basement for the rest of the Western Mediterranean region. SedDARE-IB database has been built thanks to a Portuguese-Spanish collaboration promoting open data exchange among institutions and research groups., This research has been partly supported by the project funded by the Spanish Government GeoCAM (PID2022-139943NB-I00) and GEOADRIA (PID2022-139943NB-I00). The onshore Iberia data sets were compiled under the umbrella of the ALGECO2 project (IGME-CSIC). The Lower Tagus Basin and Alentejo datasets were prepared by JC under the scope of an academic thesis and updated during projects (SISMOD/LISMOT and NEFITAG), financed by the Portuguese Foundation for Science and Technology. AMGG received a grant (FJC2021-047434-I) funded by MICIU/AEI /10.13039/501100011033 and by “European Union NextGenerationEU/PRTR”., SedDARE-IB_Readme.txt; TA_Basement_IAM_Part1_WGS84.xyz; TA_Basement_IAM_Part2_WGS84.xyz; TA_Basement_ISE_Off_Portugal_WGS84.xyz; TA_Basement_Peniche_Basin_WGS84.xyz; Top_Basement_N_LusitaniaB_WGS84.xyz; TA_Basement_Lines_Off_Lisbon_WGS84.xyz; Top_Basement_Lines_Off_SPortugal_WGS84.xyz; Top_Basement_Alentejo_and_Algarve_WGS84.xyz; Top_Basement_Lower_Tagus_Basin_WGS84.xyz; Top_Paleozoic_Basement_Onshore_IB_Basins_ETRS89.xyz; Top_Basement_WestMed_Basins_WGS84.xyz ; TA_Base_Cenozoic_IAM_Part1_WGS84.xyz; TA_Base_Cenozoic_IAM_Part2_WGS84.xyz; TA_Base_Cenozoic_ISE_Off_Portugal_WGS84.xyz; TA_Base_Cenozoic_Peniche_WGS84.xyz; Base_Cenozoic_N_LusitaniaB_WGS84.xyz; TA_Base_Cenozoic_Lines_Off_Lisbon_WGS84.xyz; Base_Cenozoic_Lines_Off_SPortugal_WGS84.xyz; Base_Cenozoic_Alentejo_Algarve_basins_Part1_WGS84.xyz; Base_Cenozoic_Alentejo_Algarve_basins_Part2_WGS84.xyz; Base_Cenozoic_Lower_Tagus_Basin_WGS84.xyz; Base_Cenozoic_Ebro_Basin_ETRS89.xyz; Base_Cenozoic_Duero_Basin_ETRS89.xyz; Base_Cenozoic_Tajo_Basin_ETRS89.xyz; Base_Cenozoic_Guadalquivir_Basin_ETRS89.xyz; Base_Cenozoic_Mallorca_Island_ETRS89.xyz; Base_Cenozoic_Valencia_Trough_WGS84.xyz; Base_Cenozoic_Alboran_Basin_WGS84.xyz; Algarve_PaleogeneUnc_TopUpperK_cokriginig_WGS84.xyz, Peer reviewed