热分析方法测定α粒子径迹密度及其在地质定年中的应用  

Determination ofαParticle Nuclear Track Density by a Thermal Analysis Method and Its Application in Geological Dating

作　　者：张建祥[1] 杨铜锁[1] 

机构地区：[1]西京学院理学院,陕西西安710123

出　　处：《信阳师范学院学报（自然科学版）》2017年第2期274-278,共5页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(11275273);西京学院科研基金项目(X1150127)

摘　　要：将热分析法测定α粒子径迹密度应用于地质定年.用中子活化分析的方法测量了安徽马鞍山磷灰石样品中^(238)U、^(232)Th和^(147)Sm的含量.另外以Dorango磷灰石作为参考标准,用热分析方法测量了样品中α粒子的径迹含量,最后经计算得到安徽马鞍山磷灰石样品的地质年代为3.63×10~7 a.与其他地质资料比较,认为其地质年龄在3000万年左右是可信的.Determination of α particle nuclear track density by a thermal analysis method was applied to geo- logical dating. The contents of 238 U、232 Th and 147 Sm isotopes in apatite samples from Ma＇ anshan Anhui were measured by the neutron activation analysis method. Besides, taking the Durango apatite as reference, the content of α particle nuclear track was measured by the thermal analysis method. At last the geological age of the apatite samples was calculated as 3.63 × 107 a. By comparison with the other geological data, It is reasonable that the geological age was 30 million years or so.

关 键 词：α粒子核径迹 热分析法 DSC曲线 磷灰石 地质定年 

分 类 号：P597[天文地球—地球化学] O571[天文地球—地质学]