VARIATION OF ELASTIC WAVE VELOCITIES IN GRANITES WITH PRESSURE AND TEMPERATURE

Abstract

The dilatational and rotational wave velocities have been measured as functions of pressure and temperature for five granites. The pressure range was 200-5,000 bars or higher. Dilatational velocities were measured over the temperature range 20-300 degrees C.; rotational wave velocities over the range 20-200 degrees C. These data indicate that below fairly shallow depths in the granitic layer the velocity is constant or even slightly decreasing.