摘要
海底沉积物很好地记录了地质历史,根据"将今论古"原则对其进行研究,对了解海洋的形成和演变具有关键意义。本文叙述了国内外海洋沉积物同位素年代学的研究进展,分析了当前常用几种定年技术如14C法、230Th法、231Pa/230Th法等的适用性和局限性,讨论了海洋沉积物同位素定年过程中存在的一些问题,指出准确定年的注意事项。
[Abstract]Marine sediment recorded geological history greatly. The principle of ＂the present is the key to the past＂ was employed to study the the marine sediment so that it was of great significance to learn about the fomation and evolution of marine.The domestic research on the isotope dating technique of marine sediment was narrated,the applicability and localization of the commonly used dating techniques such as 14C method, 230Th method,321Pa/230Th method were analyzed,the exsiting problems of isotope dating process of marine sediment were discussed and the precautions of precise dating was pointed out.
出处
《科技信息》
2012年第33期93-93,112,共2页
Science & Technology Information
关键词
海洋沉积物
同住素年代测定技术
基本原理
[ Key words ] Marine sediment
Isotope dating technique
Basic principle
