泥石流堆积物质释光退火机制研究进展  

Study on the Mechanism of Thermo-luminescence Attenuation of Debris Flow Deposit

作　　者：魏明建[1] 葛永刚[2] 刘兆文[1] 蔡茂堂[1] 王均平[1] 潘宝林[1] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100037 [2]中国科学院山地灾害与地表过程重点实验室

出　　处：《山地学报》2008年第4期433-438,共6页Mountain Research

基　　金：中国科学院山地灾害与地表过程重点实验室开放基金;北京市教委科技发展基金重点项目联合资助~~

摘　　要：采集云南东川蒋家沟泥石流源区、流通区、堆积区泥石流堆积物,利用热释光技术测定泥石流物质的残积热释光剂量,进行泥石流物质的释光退火机制研究。研究表明:泥石流物质释光本底值依源区、流通区、堆积区明显降低,其在运动过程中发生了明显的退火现象,进行泥石流的热释光测年是可行的,尤其对于低频泥石流堆积,释光测年的准确性更高。但泥石流物质的退火并不充分,需要进行本底值的矫正,相关机制需要进一步研究。The work discusses the mechanism of thermo-luminescence attenuation of debris flow deposition by testing the thermo-luminescence dose of the samples from source area,drainage area and deposition area.It is proved that thermo-luminescence attenuation occurred in the process of debris flow movement and the thermo-luminescence dose decreased in order from source area,drainage area,to deposition area.Thermo-luminescence attenuation by sunlight leads to the low thermo-luminescence dose in deposition areas and even to 0.7 Gy.The Thermo-luminescence dating is an effective method for debris flow deposition,especially the valley with the low frequent debris flow.However,it is necessary to further study the mechanism of thermo-luminescence attenuation.

关 键 词：泥石流 热释光 退火 

分 类 号：P642.23[天文地球—工程地质学]