Supplementary material for the paper: The Late Paleozoic tectonic evolution of the Paleo-Asian Ocean in the northern Alxa Block, (NW China)

Supplementary Materials include: Supplementary text: LA-ICP-MS Zircon U–Pb dating and whole-rock major and trace element Analytical methods Table S1: LA-ICP-MS zircon U–Pb isotopic dating results Table S2: whole-rock major and trace element and Sr-Nd isotopic compositions of volcanic rocks Table S3: References for geochronological data in Langshan (Fig. 2). Supplementary figure: Cumulative probability curves of measured crystallization ages for detrital zircons grains relative to the depositional age of samples from the Permian Dahongshan Formation.

补充材料包含：
补充文本：LA-ICP-MS锆石U–Pb定年及全岩主量、微量元素分析方法
表S1：LA-ICP-MS锆石U-Pb同位素定年结果
表S2：火山岩全岩主量、微量元素及Sr-Nd同位素组成
表S3：狼山地区年代学数据参考文献（图2）
补充图：碎屑锆石实测结晶年龄相对于二叠系大红山组样品沉积年龄的累积概率曲线