DETERMINATION OF TEMPERATURE AND BULK COM POSITION OF THE UPPER-MANTLE FROM SEISMIC DATA

A method of determination of temperature and bulk composition of the e arth's upper mantle was developed using profiles of shear and compress ional wave velocities. The method is based on minimization of deviatio ns of the calculated values of seismic velocity, concentration, and te mperature from corresponding seismic, petrological, and thermal data. The results of calculations of temperature and concentration profiles (using the systems CaO-FeO-MgO-Al2O3-SiO2) for the upper mantle under the Canadian shield are presented.