Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 1. Tomografía eléctrica

Abstract

Volcanic deposits and structures are characterized by a high variability in both geometry and physical properties. These changes are common not only in a vertical direction but in the horizontal one too. As a result, the geophysical study of this kind of materials has to be performed using a technique that combines a good horizontal and vertical resolution. Electrical resistivity imaging has been applied to the study of three profiles in different places of Tenerife island. The examples shown in this work are the location of lava tubes, the determination of the depth to the boundary of different lava flows, and the geometry at depth of a basaltic dyke intruding in pyroclastic deposits. In all the cases, the technique has revealed as a useful tool to determine the geometry and depth of different volcanic materials and therefore, the geophysical characterization of volcanic areas