MEASUREMENT OF P AND S SOUND VELOCITIES UNDER PRESSURE ON LABORATORY MODELS OF THE EARTH'S MANTLE
Abstract
The techniques of ultrasonic interferometry were used to measure the elastic wave velocities as a function of pressure and temperature for many minerals: polycrystalline Al2O3, a single crystal spinel (MgO.2.6Al2O3), a single crystal garnet, polycrystalline Mg2SiO4, and polycrystalline ZnO. The pressure derivatives were measured to 2 kb at room temperature, and the temperature derivatives were measured at 1 atm. New extrapolation formulas based upon the laboraty data allow us to predict the behavior of the elastic constants at high temperature. The combination of the pressure and temperature derivatives of the elastic wave velocities lead to expressions for the critical thermal gradients which can be compared to the actual geothermal gradient.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1967
- Accession Number
- AD0695073
Entities
People
- Edward Schreiber
- Orson L. Anderson