Oil & Gas Geology ›› 2013, Vol. 34 ›› Issue (4): 550-557.doi: 10.11743/ogg20130418

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A new method for apatite fission track dating—the Laser-ICPMS method

Li Tianyi1,2, Zhou Yan1, Fang Shi3, He Sheng2, He Zhiliang4, Fan Dehua1   

  1. 1. Laboratory of Structural and Sedimentological Reservoir Geology, Exploration & Production Research Institute, SINOPEC, Beijing 100083, China;
    2. Key Laboratory of Tectonics and Petroleum Resource of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China;
    3. College of Earth Sciences, Jilin University, Changchun, Jilin 130061, China;
    4. Exploration & Production Research Institute, SINOPEC, Beijing 100083, China
  • Received:2012-09-03 Revised:2013-07-08 Online:2013-08-28 Published:2013-08-27

Abstract: In this paper,a new method for apatite fission track dating using Laser-ICPMS is introduced in detail.The fission track ages of three international standard samples determined by using the new method and the conventional external detector method are basically in consistency.The test results of four clastic rock core samples,including apparent fission track ages,single grain ages and U contents are also basically the same for the new and conventional methods.The two group of ages may reflect the same tectonic uplift cooling event.As it eliminates several steps such as thermal neutron irradiation,mica ablation and induce fission rack accounting,the new method is more rapid and convenient than the traditional method,can shorten the cycle of testing,reduce the influence of human factors,and improve accuracy and reproducibility of the analysis results.However,the new method still has some uncertainties such as the influence of ablation on 238U content,depth of laser ablation,the influence of uneven U content and the selection of standard samples with similar property with apatite.

Key words: apatite, laser ablation, ICPMS, fission track dating

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