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(a) Schematic tectonic framework of China showing the location of the Qinling Orogen19; (b) Geological map of the Sichuan Basin and adjacent orogenic belts12. LWF Lingbao–Lushan–Wuyang, LLF Luonan–Luanchuan fault, MBXF Mianxian–Bashan–Xiangfan fault.
