Data for "Petrogenesis of Permian A-type and I-type felsic rocks in the southern Beishan Orogenic Collage and geodynamic implications"

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Data associated with the manuscript "Petrogenesis of Permian A-type and I-type felsic rocks in the southern Beishan Orogenic Collage and geodynamic implications"

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Zircon U-Pb dating： Zircon U–Pb dating for rhyolite and granitoids (samples XIIMZ09, XIIMZ28, XIMZ187, XIMZ197, XIIMZ203 and XIMZ209) from the Yin’aoxia and Qiaowan areas was undertaken using Laser ablation ICP–MS at the SKLIG GIG CAS. The instrument utilizes a Neptune Plus multi-collector inductively coupled plasma mass spectrometer (ICP-MS) and RESOlution M-50 193 nm laser ablation system. Helium (carrier gas) amalgamate with argon (supplemental gas) via a T-junction prior to introduction to the ICP, enabling high sensitivity, low fractionation and high-precision zircon dating. For samples XIIMZ09, XIIMZ28, XIMZ203 and XIMZ209, Zircon Temora (206Pb/238U = 416.75 ± 0.24 Ma) (Black et al., 2003) was used as an external calibration standard for primary age calibration. Zircon Plešovice (206Pb/238U= 337.13 ± 0.37 Ma) (Sláma et al., 2008) was used for secondary quality control. Glass NIST 610 (trace element glass standard) was used as an internal standard for element concentration correction. For samples XIMZ187 and XIMZ197, Zircon GJ-1 (206Pb/238U = 608.5 ± 0.4 Ma) (Jackson et al., 2004) and Zircon 91500 (207Pb/206Pb = 1065.4 ± 0.6 Ma) (Wiedenbeck et al., 1995) were used as external calibration standards for primary age calibration. Detailed procedures were referred to Liu et al. (2010). Concordia diagrams and weighted mean age computations were performed by Isoplot 3.0 program. Whole-rock major and trace element analysis： The major elements analysis was performed using X-ray fluorescence spectroscopy (XRF) at the SKLIG GIG CAS. First, the air-dried rock powder (200 mesh) was weighed (1.2-1.4 g) and placed in a porcelain crucible, which was then transferred to a high-temperature furnace and calcined at 900℃ for 3 hours. After cooling, the crucible was weighed again to determine the loss on ignition (LOI). Subsequently, 0.51–0.53 g of the calcined powder was mixed with lithium tetraborate (LiB4O7) at a ratio of 1 : 8 in a cup. The homogeneous mixture was melted at high temperature to produce a glass disc, which was finally measured on a Japanese ZSX Primus IV X-ray fluorescence spectrometer. The analytical error for major elements was less than 5 %. For trace element analysis, the powdered sample was combined with a HF-HNO3 blend and heated at high temperature for 48 hours to achieve complete dissolution. The resulting solution was then introduced into a Perkin-Elmer Sciex ELAN 6000 inductively coupled plasma mass spectrometer (ICP-MS) for trace element determination at the SKLIG GIG CAS, according to the procedure presented by Li et al. (2010). The analytical results were calibrated using international reference materials (G-2, W-2 and AGV-1) and Chinese reference materials (GSR-1, GSR-2, GSR-3 and GSD-12), with an analytical error less than 5 %.

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• National Natural Science Foundation of China

  Grant ID: 42372080

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