Modelado geofísico del basamento del área metropolitana de la ciudad de Mérida, Venezuela

the thickness of soft sediments in metropolitan merida city area was obtained from 3d gravimetric, 1d and 2d seismic refraction modelling. a bouguer anomaly map was obtained with a bouguer density of ρb=2.67 g/cc and a datum reference level of 1500 meters above sea level. anomalies vary between -381.58 and -360.57 mgal. a tridimensional density model was generated based on geological and geophysical data. 1d and 2d models from five near surface seismic refraction profiles obtained in ejido city showed the following results: apparent p and s waves velocities of 750-1115 m/s and 320-620 m/s to a first layer with a maximum thickness of 15 m. in a second layer the velocities are between 2080-2600 m/s to p waves and 550-830 m/s to s waves. the results were integrated in a geographic information system (gis).