地面测年技术——宇生同位素测年

doi:10.11867/j.issn.1001-8166.2000.02.0237

地球科学进展 ›› 2000, Vol. 15 ›› Issue (2): 237 -240. doi: 10.11867/j.issn.1001-8166.2000.02.0237

地面测年技术——宇生同位素测年

王建，徐孝彬

南京师范大学地理科学学院,江苏南京 210097；江苏教育学院地理系,江苏南京 210013

收稿日期:1999-06-08 修回日期:1999-08-16 出版日期:2000-04-01
通讯作者: 王建,男,1962年8月出生于山东,教授,主要从事自然地理学、地貌学与第四纪环境的研究。
基金资助:
国家重点基础研究项目“青藏高原隆升与环境变化”(编号:KZ951-A1-204)资助。

TECHNIQUE FOR SURFACE DATING—COSMOGENIC ISOTOPES DATING

WANG Jian ^①,XU Xiaobin ^②

①College of Geographical Sciences,Nanjing Normal University,Nanjing210097,China；②Department of Geography,Jiangsu Education College,Nanjing210013,China

Received:1999-06-08 Revised:1999-08-16 Online:2000-04-01 Published:2000-04-01

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宇生同位素测年法是一种用于地面测年的技术,它能够测出103～106a之间的地貌面的裸露年代。常用的宇生同位素有³He、¹⁰Be、²¹Ne、²⁶A1、³⁶Cl。地面宇生同位素的浓度与时间和地面侵蚀速率之间存在着函数关系。该测年法在地貌学年代测量中具有很大的潜力。

关键词: 宇生同位素测年法, 地面出露年代, 地面测年

Cosmogenic isotopes dating is a new technique.It can measure the surface exposure age of geomorphic surface in the age range of 103to 106years.Possible candiates of isotopes used for dating include³He,¹⁰Be,²¹Ne,²⁶A1,³⁶Cl.Cosmogenic isotope concentration in the surface rock is a function of age and erosion rate.This technique has great potential in Geo-surface dating.It can be used to date the glaciation events,volcanic activities,faulting rates,flooding and mud flow events and geomorphological processetc.In a word,in-situ cosmogenic isotope and cosmogenic dating technique is applicable to date the rock surface
that is impossible to be dated by the traditional technique.With the development and the wider application of this technique,geomorphology would be push forward faster.

Key words: Cosmogenic isotopes dating, Exposure age, Surface dating.

中图分类号:

P597+.3

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