Geodynamic controls on the Paleo-Asian plate evolution: Constraints from Paleozoic intrusive suites along the northern margin of the North China Craton

Zircon U-Pb dating and Hf isotopic analyses were performed at the Mineral Laser Microprobe Analysis Laboratory, China University of Geosciences, Beijing (CUGB). Zircon U-Pb analyses were obtained with a laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS). Detailed descriptions of the analytical methods are provided by Zhang et al. (2019). Data off-line processing was performed following Andersen (2002), Ludwig (2003), and Liu et al. (2010). Zircon Hf isotopic compositions were undertaken on the dated zircons using a multi-collector-inductively coupled plasma-mass spectrometer (MC-ICP-MS), coupled with a NewWave 193UC excimer laser ablation system. The instrumental conditions and analytical methods are described by Xu et al. (2019). Whole-rock major elements were conducted using X-ray fluorescence spectrometer in the Institute of Geology and Geophysics, Chinese Academy of Sciences. Trace element analyses were undertaken with a high-resolution inductively coupled plasma mass spectrometry at the State Key Laboratory of Geological Processes and Mineral Resources (Radiogenic Isotope Geochemistry-RIG lab), CUGB. Analyses of reference standards, including BHVO-2, AGV-2 and GPS-2, indicate that the analytical accuracy is better than 5% for most elements. Whole-rock Sr-Nd isotopic compositions were determined using a Neptune Plus MC-ICP-MS in the RIG lab, CUGB. The analytical procedures are similar to those followed by Li et al. (2022). Instrumental mass fractionation was normalized using 86Sr/88Sr = 0.1194 and 146Nd/144Nd = 0.7219, respectively. The average measured 86Sr/88Sr ratio of the SRM987 standard and 143Nd/144Nd ratio of the Alfa Nd standard during the analytical campaign were 0.710246 ± 14 (2SD, n=15) and 0.512420 ± 14 (2SD, n=15), respectively.

锆石U-Pb定年与Hf同位素分析在中国地质大学（北京）矿物激光微探针分析实验室（China University of Geosciences, Beijing, CUGB）完成。锆石U-Pb分析采用激光剥蚀-电感耦合等离子体质谱法（laser ablation-inductively coupled plasma mass spectrometry, LA-ICP-MS）开展，分析方法的详细细节参见Zhang等（2019）的研究。数据离线处理参照Andersen（2002）、Ludwig（2003）以及Liu等（2010）的流程。针对已完成定年的锆石，采用多接收电感耦合等离子体质谱仪（multi-collector-inductively coupled plasma-mass spectrometer, MC-ICP-MS）结合NewWave 193UC准分子激光剥蚀系统完成Hf同位素组成测试，仪器条件与分析方法详见Xu等（2019）的工作。全岩主量元素测试在中国科学院地质与地球物理研究所通过X射线荧光光谱仪完成。微量元素分析则在中国地质大学（北京）地质过程与矿产资源国家重点实验室（State Key Laboratory of Geological Processes and Mineral Resources）的放射成因同位素地球化学实验室（Radiogenic Isotope Geochemistry-RIG lab，简称RIG lab）开展，使用高分辨率电感耦合等离子体质谱仪完成测试。包括BHVO-2、AGV-2与GPS-2在内的标准物质分析结果显示，绝大多数元素的分析精度优于5%。全岩Sr-Nd同位素组成在中国地质大学（北京）RIG实验室的Neptune Plus MC-ICP-MS上测定，分析流程参照Li等（2022）的方法。分别以86Sr/88Sr = 0.1194和146Nd/144Nd = 0.7219对仪器质量分馏进行标准化。本次分析周期内，SRM987标准物质的86Sr/88Sr实测平均值为0.710246 ± 14（2SD，n=15），Alfa Nd标准物质的143Nd/144Nd实测平均值为0.512420 ± 14（2SD，n=15）。