Читать книгу Mantle Convection and Surface Expressions - Группа авторов - Страница 33

Deformation studies of lower mantle phases are complicated by the fact that many phases are unstable (Brg) or unquenchable (Ca‐Pv and pPv) to ambient conditions. Both Ca‐Pv and pPv become amorphous during pressure release and cannot be preserved to ambient pressures. Thus study of recovered samples (from high pressure and/or temperature experiments) is difficult or impossible, necessitating in‐situ analysis. A technique that has led to significant advances in deformation studies of these phases is the use of synchrotron x‐ray diffraction in conjunction with high pressure and temperature deformation devices.