Chinese Academy of Sciences

Jinghui Guo

Wei Wang

Chaofeng Li

Zhuyin Chu

Wengui Liu

A zircon ID-TIMDS Pb isotope determination method by multiple ion counters with a dynamic multi-collection protocol is provided. Compared with a commonly used multi-ion counter static determination method, the method provided by the present invention completely eliminates influences of gain differences of the different ion counters on determination results of Pb isotopes. Compared with a conventional single-ion counter determination method with five times of peak-jumps, the method provided by the present invention can obtain all of Pb isotope ratios with two times of peak-jumps, which increases the collection efficiency of Pb isotope ion beams and decreases influences of ion beam stability on Pb isotope analysis results. Consequently, compared with a multi-ion counter static method and a single-ion counter peak-jumping method, the method provided by the present invention improves the Pb isotope analysis precision for the single-grain zircon ID-TIMS U&#x2014;Pb dating method (with aPb tracer), having application potentials.

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Beijing, China

Jinghui Guo