K-Ar法和Ar-Ar法两种定年方法的差异性对比及讨论  

Comparison and Discussion of K-Ar and Ar-Ar Dating Methods

作　　者：卢磊勋 杜萌[1] 邵瀚石 

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《辽宁化工》2015年第8期1025-1027,共3页Liaoning Chemical Industry

摘　　要：目前国内外在同位素测年方面,主要运用的是K-Ar测年技术。K-Ar技术简单,操作方便,在国内外研究地质事件定年和地质热史过程中发挥了巨大的作用,是一种极其重要的同位素定年手段。但是K-Ar法的一些缺陷也被学者们毫不留情的提出来,样品用量大,分开测定样品容易产生误差等问题。Ar-Ar法的提出解决了样品用量大等问题,准确度和精确度都有了很大的提高,为地质年表提供"金钉子"般的年龄制约。但是该定年法并没有在国内得到广发应用,费用高昂,周期长,技术复杂以及存在的Ar核反冲丢失等缺点制约其应用。At present, K-Ar dating technology is widely used in the isotopic dating at home and abroad. The K-Ar technology is simple and easy to operate. It plays an important role in domestic and foreign research of geological events and geological history. It is a very important method of isotopic dating. But some defects of the K- Ar method has also been put forward by scholars, such as requiring large amount of samples, big error and so on. Ar- Ar method has been put forward to solve these questions. The accuracy and precision of the Ar- Ar method are high, and can provide the age constraints for geological chronology. However, the method is not widely used in China because of the high cost, the long testing time, and complex process and Ar nuclear recoil.

关 键 词：K—Ar法 Ar—Ar法 定年 Ar核反冲丢失 阶段加热 

分 类 号：O562.6[理学—原子与分子物理]