Paleo-Asian oceanic slab under the North China craton revealed by carbonatites derived from subducted limestones

Figure 1. A: Tectonic framework of the study area (modified from Windley et al., 2010). CAOB—Central Asian orogenic belt; QDSOB—Qinling-Dabie-Sulu orogenic belt. B: Field appearance of the carbonatite intrusion. C: Residual olivine (Ol) xenocryst partly resorbed by carbonatite melt. SC—sparry calcite; CM—carbonate matrix. D: Monomineralic aggregates consist of interlocking calcite grains.