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Small-Scale Mineralogical Heterogeneity from Variations in Phase Assemblages in the Transition Zone and D Layer Predicted by Convection Modelling |
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| Affiliation: | Arie P van den Berg* Earth Sciences Department,Utrecht University,Utrecht,The Netherlands David A Yuen Department of Geology and Geophysics and Minnesota Supercomputing Institute,University of Minnesota,Minneapolis,MN 55415,USA Michael H G Jacobs Institut für Metallurgie,TU Clausthal,Clausthal-Zellerfeld,Germany Maarten V de Hoop Department of Mathematics and Center of Applied and Computational Mathematics,Purdue University,West Lafayette,IN,USA |
| Abstract: | Small-scale heterogeneity in the deep mantle is concentrated in the upper-mantle transi-tion zone(TZ),in the depth range 410-660 km and also at the bottom 250 km D region.This encour-ages a more detailed investigation of the potential for seismic reflectivity imaging by modelling hetero-geneous structures in mantle convection models including phase transitions of the TZ and D regions.We applied finite elements with variable spacing near the boundary layers in 2-D cylindrical geometry that allow for sufficie... |
| Keywords: | mantle convection phase transition post-perovskite mineralogical heterogeneity |
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