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~(40)Ar/~(39)Ar热年代学现状与问题
引用本文:吴林,杨列坤,师文贝,王非.~(40)Ar/~(39)Ar热年代学现状与问题[J].地质科学,2010,45(3):905-916.
作者姓名:吴林  杨列坤  师文贝  王非
作者单位:1.中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京 100029;; 2.中国科学院研究生院北京 100049;3.中国地质大学(北京)北京 100083
基金项目:中国科学院知识创新工程重要方向课题 
摘    要:Ar同位素体系定年矿物的封闭温度范围广,并且可以获得650℃~150℃温度段的非线性冷却历史,因此~(40)Ar/~(39)Ar热年代学成为研究地质体热演化历史过程中最有效的工具之一。但是由于矿物中Ar同位素扩散机制还有一些问题没有清楚地被认识,因此在一定程度上制约了~(40)Ar/~(39)Ar热年代学的发展。本文介绍了目前应用最广泛的两种~(40)Ar/~(39)Ar热年代学模式:多重扩散域模式和多路径扩散模式,讨论了它们的发展现状、存在的问题、可能解决的方法以及今后的发展方向。

关 键 词:封闭温度  40Ar/39Ar热年代学  多重扩散域模式  多路径模式
收稿时间:2010-01-02
修稿时间:2010-03-25

Actualities and problems of 40 Ar/39 Ar thermochronology
Wu Lin,Yang Liekun,Shi Wenbei,Wang Fei.Actualities and problems of 40 Ar/39 Ar thermochronology[J].Chinese Journal of Geology,2010,45(3):905-916.
Authors:Wu Lin  Yang Liekun  Shi Wenbei  Wang Fei
Affiliation:(1.State Key Laboratory of Lithospheric Evolution| Institute of Geology and Geophysics| Chinese Academy of  Science|Beijing 100029; 2.Graduate University of Chinese Academy of Science| Beijing 100049; 3.China University of Geosciences(Beijing)| Beijing 100083)
Abstract:40 Ar/39 Ar thermochronology has been one of the most powerful tools for researching thermal history of geological body owing to the fact that, for Ar isotopic system, closure temperatures of minerals for dating spread a wide range and that non linear cooling history between 650 and 150 ℃ could be obtained. However, some problems with respect to the mechanisms for argon diffusion in these minerals have not been completely understood which restricts the development of 40 Ar/39 Ar thermochronology to a certain extent. Two most widely used models, multiple diffusion domain model and multipath diffusion model, will be introduced here, including their actualities, problems and possible solution, and the trend of 40 Ar/39 Ar thermochronology.
Keywords:Closure temperature  40 Ar/39 Ar thermochronology  Multiple diffusion domain model  Multipath diffusion model
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