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40Ar-39Ar同位素定年方法研究进展
引用本文:张佳,刘汉彬,李军杰,金贵善,韩娟,张建锋. 40Ar-39Ar同位素定年方法研究进展[J]. 国外铀金地质, 2014, 0(1): 53-58
作者姓名:张佳  刘汉彬  李军杰  金贵善  韩娟  张建锋
作者单位:核工业北京地质研究院,北京100029
基金项目:中国核工业集团公司地矿事业部铀矿地质科研项目"华东南热液型铀矿成矿时代与成矿温度研究"资助(编号:测D1101)
摘    要:^40Ar-^39Ar同位素定年法是由K-Ar法发展而来,通过将39K利用快中子辐照衰变成^39Ar,测量40Ar^*/^39Ar来获得年龄值.经过长期发展,该方法的测试技术逐渐成熟,其中气体提取发展为常规阶段升温法、激光显微探针法以及真空压碎流体包裹体法;气体纯化主要有冷阱去除法、钛泵吸附法、锆铝泵吸附法;气体测试的质谱仪也在灵敏度、分辨率、背景值等技术指标上有很大提高.^40Ar-^39Ar同位素定年法在石油、固体矿产等方面应用广泛,尤其在油气成藏时间、成岩成矿作用时间的热年代学研究等领域.

关 键 词:^40Ar-^39Ar法  同位素定年  地质应用  研究进展

Advances in the study of 40Ar-39Ar isotopic dating method
ZHANG Jia,LIU Han-bin,LI Jun-jie,JIN Gui-shan,HAN Juan,ZHANG Jian-feng. Advances in the study of 40Ar-39Ar isotopic dating method[J]. , 2014, 0(1): 53-58
Authors:ZHANG Jia  LIU Han-bin  LI Jun-jie  JIN Gui-shan  HAN Juan  ZHANG Jian-feng
Affiliation:(Beijing Research Institute of Uranium Geology, Beijing, 100029 China)
Abstract:^40Ar-^39Ar isotopic dating method is developed from K-Ar method which irradiate ^39K into ^39Ar by fast neutron and measure ^40Ar^*/^39Ar to get the age value. After a long-term development, testing technologies of this method is matured, gas extraction stage has been developed into the conventional step-heating method, laser microprobe law as well as fluid inclusions vacuum crushing method. Gas purification methods mainly contain cold trap removal method, titanium pump adsorption method and zirconium-aluminum pump adsorption method. For gas testing, some technical indicators of mass spectrometers have greatly improved, especially in sensitivity, resolution, background. ^40Ar-^39Ar isotopic dating method is widely applied in the fields of petroleum, solid minerals, etc., especially in thermochronology for hydrocarbon accumulation time, diagenetic time, mineralization time.
Keywords:^40Ar-^39Ar method  isotopic dating  geological application  study advances
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