Quantitative characterization of orogens through isotopic mapping by Tao Wang, Wenjiao Xiao, William J. Collins, Ying Tong, Zengqian Hou, He Huang, Xiaoxia Wang, Shoufa Lin, Reimar Seltmann, Chaoyang Wang, Baofu Han

“…We calculated the areal proportion of juvenile crust and divided the orogens into five types: (i) highly juvenile (with >70% juvenile crust); (ii) moderately juvenile (70–50%; e.g., the Altaids with ~58% and the North American Cordillera with ~54%); (iii) mixed juvenile and reworked (50–30%; e.g., the Newfoundland Appalachians with ~40% and the Lachlan Orogen with ~31%); (iv) reworked (30–10%); (v) highly reworked (<10%; e.g., the Tethyan Tibet (~3%), Caledonides (~1%), Variscides (~1%), and the Qinling-Dabie Orogen (<1%)). …”
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