同位素年代学数据处理技术及常见问题解析

Data Processing Techniques for Isotopic chronology and Analysis of Common Problems

同位素年代学数据处理是同位素年代学研究的重要环节之一,是获得可靠年龄的基本保证。数据处理过程涉及等时线及U-Pb不一致线、反等时线等直线的拟合,年龄计算过程中分析数据不确定度的设定、加权平均计算,以及假等时线的识别等诸多环节。本文介绍了常用同位素年代学数据处理程序Isoplot的使用技巧;并对数据处理过程中涉及的线性回归、等时线质量的判断及常见问题提出一些见解,以期对同位素年代学的研究有所助益。

As an important aspect of isotopic chronology studies,data processing is a fundamental guarantee for obtaining reliable ages.There are many segments in the age calculation process,such as the fitting of isochron,U-Pb inconcordia line,inverse isochron and other straight lines,the setting of analytical data uncertainty,weighted average calculation and the identification of pseudoisochron.This paper introduces some data processing techniques for the Isoplot program in terms of isotopic chronology,and also proposes some insights into the linear regression,isochron quality judgement and some common problems involved in the data processing,to contribute to the study of isotope chronology.