Advances in Earth Science ›› 2010, Vol. 25 ›› Issue (4): 418-427. doi: 10.11867/j.issn.1001-8166.2010.04.0418

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(U-Th)/He Dating Method: α-ejection Influence and Correction

Chang Yuan, Xu Changhai, Zhou Zuyi   

  1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
  • Received:2009-04-02 Revised:2010-01-05 Online:2010-04-10 Published:2010-04-10

Chang Yuan, Xu Changhai, Zhou Zuyi. (U-Th)/He Dating Method: α-ejection Influence and Correction[J]. Advances in Earth Science, 2010, 25(4): 418-427.

The recently developed (U-Th)/He dating method is one of the important low-temperature thermochronometers and widely used by apatite, zircon, titanite, garnet, et al. in geosciences. The apatite (U-Th)/He has the lowest closure temperature among the known geo-thermochronometers and is strongly sensitive to thermal events. And the minerals’ (U-Th)/He measuring results also could be used to inverse the geothermal history. According to the development of this technique, the factors which are able to influence the helium dating results are studied deeply. On the base of the review of the principle of (U-Th)/He dating, this paper introduces the α-ejection, its effect on helium age calculation and correcting methods, especially analyzes the effect of mineral zonation, crystal shape, surface-to-volume ratio, and other factors on helium age correction. Furthermore, the principle, characters, development and recent achievements of α-ejection correcting models are also summarized in sequence.

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