“…The samples from the Khatan 17 granitic pluton plot in the post or late collisional field, indicating emplacement in a post or late collisional setting. It is worth noting that a large number of Late Carboniferous-early Permian peralkaline granites and Atype granites were emplaced in the Sino-Mongolia border region, along with the eruption of A-type rhyolites, and they also represent a post-collisional setting (Hong et al, 1994;Kovalenko and Yarmolyuk,1995;Gorton and Schandl, 2000;Gerel et al, 2005;Blight et al, 2010a;Zhang, 2014;Tong et al, 2015;Wang T et al, 2017;Song et al, 2019). Furthermore, the characteristics of the 320-270 Ma arc-like intra-continental basalts in the area suggest that they were generated in a post-orogenic extensional environment, facilitated by subducted-slabdriven deep-earth fluid recycling (Fu et al, 2016;.…”