The geochemical and zircon U-Pb dating data of the Milai section in the Gonjo Basin, Southeast Tibet

The geochemical data (in our case Rb/Sr and Ti/Ca data) were measured using an Innov-X Systems X-ray fluorescence (XRF) spectrometer, and used to carried out cyclostratigraphic analysis (and establish a floating astronomical timescale) and trace orbital-scale climate changes in the Gonjo Basin. The zircon U-Pb dating were performed using an Agilent 7900 ICP-MS equipped with a coherent 193 nm excimer laser ablation system (GeoLas HD) and identified the age of the volcanic layer at 866 m in the Gonjo Basin, and anchored in numerical time in order to obtain an absolute astronomical timescale.

本研究中的地球化学数据（涵盖铷锶比（Rb/Sr）与钛钙比（Ti/Ca））通过Innov-X Systems公司的X射线荧光（X-ray fluorescence, XRF）光谱仪完成测试，被用于开展旋回地层学分析、构建浮动天文年代标尺，并记录贡觉盆地内的轨道尺度气候变化。锆石U-Pb定年实验依托搭载相干193nm准分子激光剥蚀系统（GeoLas HD）的安捷伦7900电感耦合等离子体质谱仪（ICP-MS）完成，确定了贡觉盆地866米处火山岩层的年代，并将其锚定至数值年代框架中，以获取绝对天文年代标尺。