Pt-Os同位素系统定年方法研究  

Pt-Os Isotope System Dating

作　　者：杜安道[1] 杨刚[1,2] 屈文俊[1] 陈江峰[2] 杨胜洪[1,2] 

机构地区：[1]国家地质实验测试中心,北京100037 [2]中国科学技术大学,安徽合肥230026

出　　处：《质谱学报》2005年第z1期57-58,共2页Journal of Chinese Mass Spectrometry Society

基　　金：国家自然科学基金项目(49973017)

摘　　要：Six massive ores in the Jinchuan deposit were dated by Re-Os technique. The Os concentrations and isotopic ratios were determined by N-TIMS, while Re and Pt concentrations were determined by ICP-MS. The samples gave an isochron age of (852±25) Ma with an initial 187Os/188Os ratio of 0.255 ± 0.014. A 7-point Pt-Os isochrone gives an age of (870±38) Ma with an initial 186Os/188Os ratio of 0.119 84±0.000 27.

关 键 词：Pt-Os ISOTOPE system NEGATIVE thermal ion MASS SPECTROMETRY (N-TIMS) inductively coupled plasma MASS SPECTROMETRY (ICP-MS) 

分 类 号：O657.63[理学—分析化学]