Figure 7
Pressure–temperature diagram showing the peak metamorphic conditions for samples YA-7-18-40 and YA-7-18-47, and retrograde P–T conditions for sample YA-7-18-47. The metamorphic P–T conditions are determined by thermobarometers of Grt–Omp–Ph26, Amp–Pl30 and Al-in-Amp31. The quartz–coesite and diamond–graphite reaction lines are based on refs64,65. The grid of metamorphic facies is based on ref.66. Abbreviations: EG–eclogite facies; BS–blueschist facies; PP–prehnite–pumpellyite facies; ZEO–zeolite facies; GR–granulite facies; AM–amphibolite facies; EA–epidote amphibolite facies; GS–greenschist facies. Figure was drafted by Xin Jin using the software of CorelDRAW X6.
