Your SampleOur Solution
您的样品我们的解决方案
武汉上谱分析科技有限责任公司
分析方法描述
2018年10月
Your SampleOur Solution
您的样品我们的解决方案
武汉上谱分析科技有限责任公司
分析方法描述
（代表实验中激光束斑和频率的数值，根据具体实验条件填写。锆石常规分析条件为32 m和5 Hz）
1.1. 锆石LA-ICP-MS微区原位U-Pb定年和微量元素分析
锆石U-Pb同位素定年和微量元素含量在武汉上谱分析科技有限责任公司利用LA-ICP-MS同时分析完成。详细的仪器参数和分析流程见Zong et al. (2017)。GeolasPro激光剥蚀系统由COMPexPro 102 ArF 193 nm准分子激光器和MicroLas光学系统组成，ICP-MS型号为Agilent 7700e。激光剥蚀过程中采用氦气作载气、氩气为补偿气以调节灵敏度，二者在进入ICP之前通过一个T型接头混合，激光剥蚀系统配置有信号平滑装置(Hu et al., 2015)。本
次分析的激光束斑和频率分别为m和Hz。U-Pb同位素定年和微量元素含量处理中采用锆石标准91500和玻璃标准物质NIST610作外标分别进行同位素和微量元素分馏校正。每个时间分辨分析数据包括大约20-30 s空白信号和50 s样品信号。对分析数据的离线处理（包括对样品和空白信号的选择、仪器灵敏度漂移校正、元素含量及U-Pb同位素比值和年龄计算）采用软件ICPMSDataCal (Liu et al., 2008; Liu et al., 2010)完成。锆石样品的U-Pb年龄谐和图绘制和年龄加权平均计算采用Isoplot/Ex_ver3 (Ludwig, 2003) 完成。
（岩石薄片中锆石U-Pb同位素定年参考Zong et al. (2010)）。
1.2. In-situ U-Pb dating and trace element analysis of zircon by LA-ICP-MS
U-Pb dating and trace element analysis of zircon were simultaneously conducted by LA-ICP-MS at the Wuhan SampleSolution Analytical Technology Co., Ltd., Wuhan, China. Detailed operating conditions for the lar ablation system and the ICP-MS instrument and data reduction are the same as description by Zong et al. (2017). Lar sampling was performed using a GeolasPro lar ablation system that consists of a COMPexPro 102 ArF excimer lar (wavelength of 193 nm and maximum energy of 200 mJ) and a Mi
croLas optical system. An Agilent 7700e ICP-MS instrument was ud to acquire ion-signal intensities. Helium was applied as a carrier gas. Argon was ud as the make-up gas and mixed with the carrier gas via a T-connector before entering the ICP. A “wire” signal smoothing device is included in this lar ablation system (Hu et al., 2015). The spot size and frequency of the lar were t to m and Hz, respectively, in this study. Zircon 91500 and glass NIST610 were ud as external standards for U-Pb dating and trace element calibration, respectively. Each analysis incorporated a background acquisition of approximately 20-30 s followed by 50 s of data acquisition from the sample. An Excel-bad software ICPMSDataCal was ud to perform off-line lection and integration of background and analyzed signals, time-drift correction and quantitative calibration for trace element analysis and U-Pb dating (Liu et al., 2008; Liu et al., 2010). Concordia diagrams and weighted mean calculations were made using Isoplot/Ex_ver3 (Ludwig, 2003).
（The real in-situ U-Pb dating of zircon in thin-ction can cite reference of Zong et al. (2010)）.
2.1. 铀矿LA-ICP-MS微区原位U-Pb定年
铀矿U-Pb同位素定年在武汉上谱分析科技有限责任公司利用LA-ICP-MS同时分析完成。详细的实验流程、数据处理和校正策略见Zong et al. (2015)。GeolasPro激光剥蚀系统由COMPexPro 102 ArF 193 nm准分子激光器和MicroLas光学系统组成，ICP-MS型号为Agilent 7700e。激光剥蚀过程中采用氦气作载气、氩气为补偿气以调节灵敏度，二者在进入ICP之前通过一个T型接头混合，激光剥蚀系统配置有信号平滑装置(Hu et al., 2015)。本次分析的激光束斑和频率分别为10m和1Hz。U-Pb同位素定年处理中采用铀矿标准物质GBW04420作外标进行同位素分馏校正。每个时间分辨分析数据包括大约20-30 s空白信号和50 s样品信号。对分析数据的离线处理（包括对样品和空白信号的选择、仪器灵敏度漂移校正以及U-Pb同位素比值和年龄计算）采用软件ICPMSDataCal (Liu et al., 2008; Liu et al., 2010)完成。铀矿样品的U-Pb年龄谐和图绘制和年龄加权平均计算采用Isoplot/Ex_ver3 (Ludwig, 2003) 完成。
2.2. In-situ U-Pb dating of uraninite by LA-ICP-MS
U-Pb dating of uraninite was conducted by LA-ICP-MS at the Wuhan SampleSolution An
alytical Technology Co., Ltd., Wuhan, China. Detailed operating process and data reduction are the same as description by Zong et al. (2015). Lar sampling was performed using a GeolasPro lar ablation system that consists of a COMPexPro 102 ArF excimer lar (wavelength of 193 nm and maximum energy of 200 mJ) and a MicroLas optical system. An Agilent 7700e ICP-MS instrument was ud to好的文章开头
acquire ion-signal intensities. Helium was applied as a carrier gas. Argon was ud as the make-up gas and mixed with the carrier gas via a T-connector before entering the ICP. A “wire” signal smoothing device is included in this lar ablation system (Hu et al., 2015). The spot size and frequency of the lar were t to 10m and 1Hz, respectively. Uraninite standard GBW04420 was ud as external standard for U-Pb isotope calibration. Each analysis incorporated a background acquisition of approximately 20-30 s followed by 50 s of data acquisition from the sample. An Excel-bad software ICPMSDataCal was ud to perform off-line lection and integration of background and analyzed signals, time-drift correction and quantitative calibration for U-Pb dating (Liu et al., 2008; Liu et al., 2010). Concordia diagrams and weighted mean calculations were made using Isoplot/Ex_ver3 (Ludwig, 2003).
