• 责任者：Huang Yu (College of Information Management ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Huang Sijing
• 刊名：Journal of Mineralogy and Petrology
• 出版年：2009
• 卷期：29(1)
• 关键词：同位素地层学 ; isotope stratigraphy ; 锶同位素 ; strontium isotopes ; 扬子地台 ; Yangtze Platform
• 页码：p.74-79
• 图表：5 illus., 24 refs.
• 分类号：1300
• issnNo：ISSN1001-6872
• isbnNo：CN51-1143/TD

At present, it is difficult to find a specific function to describe the variation of geological data with time and stratigraphic thickness. However, LOWESS method proved to be such an effective method in fitting these data. Based on the mathematical method, 98 data of marine strontium isotope data from the Upper Yangtze platform carbonate in China were selected for the LOWESS fitting. The fitting curves obtained can be compared with the global date of ⁸⁷Sr^/86Sr age database and can be used to demarcate the stratigraphic age. Meanwhile, the difference between parametric and nonparametric regression from the view of the mathematics, and the error affecting the fitting outcome were also discussed in the paper.