长白山地区近代火山岩的ESR测年研究
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Electron Spin Resonance (ESR) Dating of Recent Volcanics from Changbai Mountains
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    摘要:

    在对火山灾害和潜在危险性评价中火山活动的时代起着极其重要的作用,但是,目前还没有成熟的测年方法能够对年轻火山岩直接定年。本文采用电子自旋共振(ESR)测年方法对年轻火山岩直接测年进行了尝试。所测年轻火山岩石英矿物中没有E信号,有较弱的Ge中心信号,根据Ge中心信号获得了长白山三期近代火山岩的年龄,其中,气象站碱性流纹岩的ESR年龄约3930 a BP,而气象站碱性流纹岩之下粗面岩的ESR年龄约为17500~20900 a BP。

    Abstract:

    Dating of young volcanic eruption is sentinel because of the need to assess vol canic hazards, but there has not been a reliable, direct dating method for young volcanics. The test of electron spin resonance dating method for recent volcani cs is described here, there is no E signal in quartz from volcanics, the signa l of Ge in quartz from young volcanics is very weak. The ages of three phases of volcanics by Ge signal were obtained. The ESR age of pantellerite at Qixiangzha n is 3930 a BP, and the trachyte under pantellerite has a ESR age of 17500~209 0 0 a BP.

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尹功明,业渝光,万京林,孙瑛杰,陈文寄,刁少波.1999.长白山地区近代火山岩的ESR测年研究[J].地质论评,45(7):287-293,[DOI].
Yin Gongming, Ye Yuguang, Wan Jinglin, Sun Yingjie, Chen Wenji, and Diao Shaobo.1999. Electron Spin Resonance (ESR) Dating of Recent Volcanics from Changbai Mountains[J]. Geological Review,45(7):287-293.

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