Geochronology and geochemistry of single-grain zircons: Simultaneous in-situ analysis of U-Pb age and trace elements by LAM-ICP-MS
Geochronology and geochemistry of single-grain zircons: Simultaneous in-situ analysis of U-Pb age and trace elements by LAM-ICP-MS
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DOI：
10.1127/0935-1221/2000/0012-1015
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发表时间：
2000-09
影响因子：
2.1
通讯作者：
Xian‐Hua Li;Xi-rong Liang;Min Sun;Y. Liu;X. Tu
中科院分区：
文献类型：
--
作者：
Xian‐Hua Li;Xi-rong Liang;Min Sun;Y. Liu;X. Tu
Simultaneous in-situ analysis of U-Pb age and 26 trace elements for single-grain zircon using the LAMICPMS technique was successfully achieved in this study. The precision of analysis is 1 to 3 % for 207 Pb/ 206 Pb isotopic ratios, 2 and 8 % for 206 Pb/ 238 U ratios and 5 to 15 % for most of the other trace elements. The concordia U-Pb and the mean 206 Pb/ 238 U ages for zircon grain of 1800 Ma to 150 Ma by LAM-ICP-MS spot analysis are in good agreement within analytical errors with the TIMS and SHRIMP results. All zircon grains are uniquely LREE-depleted in chondrite-normalized REE patterns. Zircon formed in mantle-derived magmas is significantly different from that of granitoids with regard to contents of many trace elements ( i.e. , U, Th, ΣREE, Y, Nb and P) and REE patterns ( i.e. , Nd/Yb ratio and Ce and Eu anomalies). This combined geochronological and geochemical investigation provides valuable information on timing and genesis of zircon.
