《Table 1 LA–ICP–MS U–Pb isotopic data for the series I quartz diorite and the series II monzogranite

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《"Isotope Geochronologic and Geochemical Constraints on the Magmatic Associations of the Collisional Orogenic Zone in the West Kunlun Orogen, China"》

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Series I:The cathodoluminescence（CL）images（Fig.3a）of the zircons from the quartz diorite granite sample（JJWX–04）show that these zircons are 90–180μm long，mostly euhedral to subhedral，and have clear oscillatory zones indicating a magmatic origin.A few cores show irregular dark areas，which may be caused by erosion or gas–liquid inclusions/impurities filling zircon fractures（Fig.3a；spots 11 and 12）.The zircons feature relatively symmetrical dual conical surfaces（Fig.3a，spots 2，4，6，11 and 12）.Zircon grains from series I have U contents of209–647 ppm（avg.437），Th contents of 142.12–724.64ppm（avg.363.56），and Th/U ratios from 0.56 to 1.12（Table 1），indicating that they are of magmatic origin as well.Fig.4a shows that the range of zircon ages is219±2.2 Ma–239±3.5 Ma，with a weighted mean age of224.0±2.0 Ma（MSWD=1.1，96.1%confidence level），which represents the crystallization age of the intrusion.