On Research Achievements in Earth’s D″ Layer in Core-Mantle Boundary: An Important Breakthrough in 21st Experimental Petrology
The mineral composition in layer D″ of core-mantle boundary was always thought as MgSiO3 perovskite. In recent years, through experiment, the Japanese scholars composed a new kind of mineral with high temperature and high pressure that was MgSiO3 post-perovskite and regarded the post-perovskite mineral phase as the major properties of core-mantle boundary. This important achievement solved the genetic problem of seismic wave anisotropic property of D″ layer that puzzled the academia for a long term, exposed the essential reason of seismic wave inconsistency.