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Unformatted text preview: Van der Hilst, RD et al. 1997. Nature 386: 578-584 Svensen, H et al 2004. Nature 429: 542-545 Justin Liefer MAS 603 P-Wave • Compression wave • Only through solids • fast-moving first arriving S-Wave •Shear wave •Solids and liquids • slower •longitudinal Surface Waves • Rayleigh waves • long wave, slow • waves passing through different substances • light and tranparent liquids – refractive index • with seismic waves – impedence •Impedence depends on wave velocity and density of substance Seismic tomography Reflection Sesimology Convective Mantle • Mineral phase changes to weak for stratification • Deep anomalies = slabs in lower mantle •Global Tomography and gravity data explained better Stratified Mantle • Some slabs stuck in upper mantle • •Really old reservoirs = poorly mixed • Large database over 30 years • Model by inversion • Comparison to other on-going models • P-wave data for Lower Mantle • High Resolution Great deal of similarity with model based on S- waves Slab model for 1800-2000 km- Excellent recovery •...
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This note was uploaded on 02/10/2012 for the course MAS 603 taught by Professor Haywick during the Fall '11 term at S. Alabama.
- Fall '11