Studies of the Equation of State and Elasticity of Mantle Minerals

摘要: Because the Earth’s upper mantle is inaccessible to us, in order understand chemical and physical processes that occur interior we must rely on both experimental work computational modeling. This thesis addresses of these geochemical methods. In first chapter, I develop an internally consistent comprehensive molar volume model for spinels oxide system FeO-MgO-Fe 2 O 3 -Cr -Al -TiO . The compared current MELTS spinel with a demonstration impact difference estimated spinel-garnet lherzolite transition pressure. second calibrate cubic garnets SiO -Fe -FeO-MnO-MgO-CaO-Na O. use method singular value analysis excess mixing parameters garnet model. implications has density lithospheric are explored. third discuss nuclear inelastic X-ray scattering (NRIXS) method, present three orthopyroxene samples different Fe contents. Longitudinal shear wave velocities, elastic parameters, other thermodynamic information extracted from raw NRIXS data.