地理科学 ›› 2002, Vol. 22 ›› Issue (5): 587-591.doi: 10.13249/j.cnki.sgs.2002.05.587

• 论文 • 上一篇    下一篇

地貌学与第四纪研究的新手段——陆地宇生核素研究

徐孝彬1, 王建1, Françoise Yiou2, Grant Raisbeck2   

  1. 1. 南京师范大学地理科学学院 江苏 南京 210097;
    2. Centre de Spectrométrie Nucléaireet de Spectrométrie de Masse, IN2P3-CNRS, Batiment 108 91405 Orsay campus, France
  • 收稿日期:2001-11-27 修回日期:2001-05-30 出版日期:2002-09-20 发布日期:2002-09-20
  • 基金资助:
    教育部“教育振兴计划”青年教师奖励基金项目(2001DLXSBJBC12)资助;江苏教育学院科学研究“十五”规划项目资助。

New Means in the Study of Geomorphology and Quaternary——Research of Terrestrial Cosmogenic Isotopes

XU Xiao-bin1, WANG Jian1, Françoise Yiou2, Grant Raisbeck2   

  1. 1. Geographical Science College, Nanjing Normal University, Nanjing, Jiangsu 210097;
    2. Centre de Spectrom閠rie Nucl閍ire et de Spectrom閠rie de Masse, IN2P3-CNRS, Batiment 108, 91405 Orsay campus, France
  • Received:2001-11-27 Revised:2001-05-30 Online:2002-09-20 Published:2002-09-20

摘要: 暴露岩石表层中的宇生核素的浓度,是产生速率、衰变常数及侵蚀速率的函数。根据该原理,在宇生核素形成速率为已知的条件下,建立宇生核素浓度与时间及侵蚀速率的函数关系,根据该模式可对岩面的暴露时间及侵蚀速率进行计算,这使得该测年技术在地貌学与第四纪研究中有着极大的运用前景。在众多的宇生核素中,取自于石英的26Al和10Be是目前该领域中运用最广泛、最成熟的宇生核素。

Abstract: Because of cosmogenic isotopes production, the concentration of cosmogenic isotope in surface layer of the exposed rocks accumulates more and more, and at same time, it becomes less and less with isotope’s radiation and surface’s erosion. With this principle, under the condition of cosmogenic isotopes production rate being well known, the function between the concentrations of cosmogenic isotopes and time and erosion can be calculated. Using this model, we can calculate the exposed ages and erosion rate of the surface. This makes the dating technique be very useful and have a good provision in the study of Geomorphology and Quaternary. In cosmogenic isotopes, 26Al and 10Be deriving from quartz are used most widely and maturely in this field.

中图分类号: 

  • P539.7