Meeting room "Glova", 4 floor, Integrated Research Building
Abstract
In order to make insights into the deep mantle heterogeneity, it is important to understand the high-pressure elasticity of materials with different lithology. We modeled those of subducted crustal materials based on new ab initio elasticity data of calcium silicate perovskite and calcium ferrite-type aluminous phase. Calculations elucidated that the basalt composite is denser than the pyrolitic one throughout the entire lower mantle pressures. However, a more felsic granitic composite was no denser than peridotite below the mid-lower mantle. We then found the shear wave speed of Ca-Pv is considerably slower than previous results for a reason to be explained in detail, which leads to the shear wave slower in the basalt composite than in the pyrolite, while quite comparable in the compressional wave. We are also investigating these kinds of properties at further pressures.
For inquiry：Taku Tsuchiya TEL:（089）927-8198
E-mail takut@sci.ehime-u.ac.jp
