Fig. 7
Phases of CaCO3 at upper mantle conditions and the schematic for deep carbon recycle. The geotherms follow Gerya and Yuen58 and Penniston-Dorland et al.59. The blue dot and blue shaded area in subducting slabs represent the amorphous CaCO3 and concentration area of amorphous CaCO3, respectively. The blue shaded particles in mantle wedge are escaped amorphous CaCO3 through percolation. At the top of the asthenosphere in mantle wedge, the amorphous CaCO3 would transform back to aragonite
