知识与财富的链接
利用激光剥蚀多接收器电感耦合等离子体质谱法(LA-MC-ICP-MS),建立了磷灰石微区原位 U-Pb同位素定年新方法,本文给出了这一新方法的分析流程,报道了利用这一新方法对5个磷灰石样品的分析结果,并应用同位素稀释-热电离质谱法(ID-TIMS)对一些样品定年结果进行了验证.磷灰石工作标样 SDG 的U-Pb 同位素年龄:(1596±15) Ma (MSWD=1.5, n=7, LA-MC-ICP-MS),(1602±13) Ma (MSWD=0.578, n=5, ID-TIMS);某铁矿石中磷灰石的 LA-MC-ICP-MS U-Pb 同位素年龄:(125±14) Ma (MSWD=0.68, n=25),(124.2±3.5) Ma (MSWD=1.5, n=37);新疆阿尔金地区片麻岩中磷灰石的LA-MC-ICP-MS U-Pb同位素年龄:(250.8±3.9) Ma (MSWD=8.6, n=26),(245.4±2.9) Ma (MSWD=2.1, n=39).
A new in situ U-Pb dating method for apatite using LA-MC-ICP-MS has been established, and the experimental process is described in this paper. 5 apatite U-Pb dating results determined by the new method and verified by ID-TIMS method are reported in this paper, with the data obtained being standard qpatite SDG, (1596±15) Ma (MSWD=1.5, n=7, LA-MC-ICP-MS), (1602±13) Ma (n=5, MSWD=0.578, ID-TIMS); apatite samples from an iron deposit, (125±14) Ma (n=25), (124.2±3.5) Ma (MSWD=1.5, n=37); apatite from gneissic rocks in the Altun Mountains of Xinjiang, (250.8±3.9) Ma (MSWD=8.6, n=26), (245.4±2.9) Ma (MSWD=2.1, n=39).
