Chronological data of the regional Middle Triassic unconformity in the North Qiangtang

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Table S1. Major element composition of the bauxite from the Upper Nayixiong Formation in the Kaixinling(wt%). Table S2. U-Pb isotopic ratios and ages of the samples from the Nayixiong Fromation and Jiapila Fromation in the Kaixining area. Table S3. Summary of the Middle Triassic angular unconformities in the North Qiangtang basin. Table S4. Ages of magmatic rocks from Jinshajiang and Longmuco-Shuanghu sutures. Table S5. Compilations of the geochronological data of the closure of the Paleo-Tethys Ocean.

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The Major element composition in Table S1 was measured using a JEOL- JXA-8230 electron microprobe equipped with wavelength-dispersive spectrometers at the School of Geoscience and Technology, Southwest Petroleum University. The microprobe operated at an accelerating voltage of 15 Kv and a beam current of 20 nA. The beam spot diameter was 5μm and the average limit of detection for each element was 0.01wt%. The data in Table S1 used albite for Na and Al, olivine for Mg and Si, potassium feldspar for K, diopside for Ca, chromite for Fe and Cr, rutile for Ti and buchstamite for Mn. The zircon U-Pb isotopic ratios in the Table S2 were conducted using laser ablation-inductively coupled plasma-mass spectrometer (LA-ICP-MS) at the Key Laboratory of Carbonate Reservoir, Southwest Petroleum University. The zircons of samples were ablated by an Excimer laser with a spot diameter of 30μm. Subsequently, the ablated materials were transported in helium to the plasma source of an Agilent 7800 inductively coupled plasma-mass spectrometer (ICP-MS) and analyzed using Faraday detectors for 238U, 232Th, 208Pb and 206Pb. To correct for inter-element fractionation of Pb/U, elemental fractionation between U and Pb was monitored by the NIST610 and the Plešovice zircon. Common Pb correction and sample ages calibration were performed using ComPbCon#3.17. The data from the Table S3, S4 and S5 are obtained from the published papers and specific references are listed at the end of the corresponding data.

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