Study highlights
Relation of studies and geophysical projects highlights
The ICGC applies different methods of geophysical exploration both to collaborate with the different activities and projects that are carried out in the six areas, as well as to the needs that can arise in the area of the Department itself or in other departments of the Public Administration. It also carries out geophysical studies for specific external requests and for the purpose and elaboration of technical criteria for the application of geophysical methods and research activities both at the experimental level and at the instrumental level.
The ICGC collaborates closely with universities, participates in national and international research projects, and carries out knowledge dissemination activities through the publication of scientific articles and participation in conferences and informative events.
The highlighted studies presented are the following (in Catalan):
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Combination of gravimetric measurements, a profile of magnetotelluric stations and point measurements of environmental seismic noise, passive seismic to find 2D models of the structure of the Conca de Barberà.
By performing seismic refraction tomography profiles, models of the speed of P and S waves are obtained, which allow the geomechanical parameters of subsoil materials to be estimated, giving an idea of the quality of the rock by calculating the degree of compaction, rock alteration, etc.
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In 2019, the geophysical characterization of the Empordà Basin began with the gravimetric technique and later, with measurements from the spectral quotient H/V (2020). In the Empordà Basin, several geophysical research works carried out in different years are compiled in order to characterize the geological structure of the area, reducing uncertainties.
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The ICGC implements for the first time the gravimetric technique to study one of the basins of Catalonia. This study complements the one already started in 2013 but with a wider extension since this technique allows a more regional implementation.
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Final report of the geophysical tasks developed in the EBROADMICLIM project between the years (2014-2018). In this study there is a wide range of geophysical methods: logs, electrical tomography, seismic tomography, magnetotelluric stations, seismic array and spectral quotient H/V technique. The results have provided a detailed knowledge of the materials that form the Ebro Delta defining their thicknesses and lateral and vertical variations, the depth of the substrate and, the evolution and extension of the saline intrusion.
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Carrying out various geophysical works for the study of deep geological structures related to the geothermal resources of the Vallès: 2D geophysical prospecting works with the audio-magneto-telluric technique for deep geothermal resources in Samalús-La Garriga (2014). Acquisition of magnetotelluric data and 3D modeling and geophysical interpretation works (3D inversion of the data) for the study of deep geological structures in the area of Catalonia: La Garriga (Vallès Oriental) (2015-2016). Application of the H/V spectral quotient method in the Vallès Oriental to detect the bedrock as support for geophysical prospecting with the magnetotelluric technique (2016).
Study of the structure of the Llobregat Delta using the combination of the H/V spectral quotient technique, the seismic array and active seismic profiles of surface waves.
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Geophysical study integrating passive seismic and electromagnetism geophysical methods for the characterization of the structure of the Cerdanya basin.
Determine the geometry of the paleochannels refilled with Quaternary sediments in the Cala Montgó area and detect the depth at which the rocky basement formed by limestone is found.
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Carrying out a geophysical campaign to characterize the soft soil layer and verify its possible effects. On the other hand, characterize the seismic response of the soil layer by recording aftershocks in different locations.
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Detailed characterization of the layers that form the subsoil to help establish the nature of the detected phenomenon (fractures in streets and buildings since 2010).
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Assessment of seismic hazard at a local scale (Val d'Aran and Girona).
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Characterize the terrain in detail based on the correlation between the data from the logs with a geophysical testing campaign, in 4 piezometers located in the Osona region.
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Geophysical testing campaign in 17 piezometers and 4 injection wells distributed between the Zona Franca (Barcelona) and El Prat de Llobregat for the characterization of the subsoil, control of aquifers and saline intrusion.
Lithological characterization of the subsoil in the municipality of Salt (Gironès) applying two different study scales.
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Development and application of a methodology for the assessment of seismic hazard based on seismic wave attenuation relationships and local seismic effects.
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Detailed characterization of the layers that form the subsoil to help establish the nature of the detected phenomenon (cracks in streets and buildings since 2010.
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Seismic noise measurements in Barcelona for subsoil characterization (SISNEPI). Characterization of the seismic response of the soil and seismic microzonation studies to contribute to the establishment of seismic risk scenarios useful for emergency planning and management (SISMICAT).
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Test the effectiveness of different geophysical techniques in determining the thickness of the layer of soolón and/or quaternary materials existing above the unaltered granite basement.
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Geothermal study based on the variation in temperature and conductivity of the well fluid using the fluid temperature and conductivity probe..
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Study of the possible effect of blasting on the stability of unstable blocks on the slope surface.
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Study of both the evolution of marine intrusion and the complex lithological structure present in La Tordera area. The aim is to obtain an estimate of the thickness of the layers, the continuity of the aquifer units, the morphology, the depth of the rocky basement ceiling (fresh granite) and the state of the marine intrusion.