Velocidades de transmisión de ondas P y S en rocas máficas y ultramáficas. Datos obtenidos experimental mente y calculados. Macizo de Sierra Alpujata. (Cordilleras Béticas)

Abstract

The seismic properties of upper mantle representative samples from the Ronda ultramafic body (Betic Cordillera, Spain) have been determined using laboratory direct measurements and calculations based on the lattice preferred orientations (LPOs) of major minerals. Samples of selected mafic and ultramafic rocks collect the main petrological facies and microstructures present in the Sierra Alpujata Massif. This allows to analyse the lithological and microestructural Influence in the P-and S-waves velocities and seismic anisotropy and the strong control produced by the serpentization degree. Reflection coefficients between lithological interfases have been calculated from laboratory measurements allowing the characterization of potential seismic reflectors in the subcontinental upper mantle