Allanite micro-geochronology: A LA-ICP-MS and SHRIMP U-Th-Pb study
Gregory, Courtney; Rubatto, Daniela; Allen, Charlotte M; Williams, Ian; Hermann, Joerg; Ireland, Trevor
The accessory mineral allanite occurs in a wide range of igneous and metamorphic rocks and contains appreciable amounts of trace elements including the REEs, Sr, Th and U. The high degree of compositional substitution and the variable incorporation of common Pb into the allanite crystal structure, however, have limited its use for U-Th-Pb dating. Procedures have now been developed for the isotopic dating of allanite using Laser Ablation ICP-MS and the Sensitive High Resolution Ion Microprobe...[Show more]
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