Geochemical data of alkali feldspar granite in Baliqiao area, northern Lesser Khingan

The zircon U-Pb dating sample of alkali feldspar granite was collected 0.5 km southwest of the production site of the Mengde River Brigade, with sample number D1858 and sampling location at 126 ° 16 ′ 24.67 ″ E; 49 ° 45 ′ 54.79 ″ N. Zircon sorting was carried out in the laboratory of Hebei Regional Survey Institute, and conventional gravity method was used to screen zircons. Firstly, the granite particles are crushed to 0.1 mm, manually floated, and then purified under a binocular microscope. The zircon has high transparency and no inclusions, mainly in the form of long and short columns. Zircon target making, transparent reflection microscopy, and cathodoluminescence photography were all completed by Beijing Zircon Navigation Technology Co., Ltd. Zircon U-Pb isotope dating analysis was completed in Isotope Geochronology Laboratory of China Geological Survey Tianjin Geological survey Center. Using laser ablation multi receiver Inductively coupled plasma mass spectrometry (LA-MC-ICP-MS), the New Wave 193-FX ArF excimer laser is connected to the Neptune MC-ICPMS of Thermo Fisher. He gas is used as the carrier gas of the ablation material, and the laser spot diameter is 30 μ m. The erosion time was 30 seconds, and the artificially synthesized silicate standard reference material NIST 610 developed by the National Institute of Standards and Technology of the United States was used as an external standard to correct the U, Th, and Pb content of zircon. Zircon GJ-1 was used as an external standard to correct the U-Pb isotope ratio and age. The main trace element and Nd isotope samples of the whole rock were collected from the Early Permian alkali feldspar granite body at the production site of Mengde River Brigade, north of Antai Mountain and north of Baliqiao in the study area. After thin sections are made and identified under microscope, fresh samples are selected for whole rock geochemical analysis and testing. Six major and trace element samples were tested by China Geological Survey Shenyang Geological survey Center and Heilongjiang Institute of Geology and Mineral Testing and Application. The major elements were tested by X-ray fluorescence spectrometry (XRF), and monitored by GB/T14506-2010 and GHJZ 003-2009 standards. FeO was dissolved by hydrofluoric acid sulfuric acid and titrated by Potassium dichromate, and the analytical deviation was better than 2%. Trace elements were analyzed by Inductively coupled plasma mass spectrometry (ICP-MS), and the measurement accuracy was better than 5%. One Nd isotope sample was analyzed by the Thermal Ionization Mass Spectrometer (Triton) of the Central South Mineral Resources Supervision and Testing Center.