热释光信号在泥石流发生后的变化  

Changes in TL signals from debris flow substance

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

机构地区：[1]首都师范大学光断代实验室,北京100048 [2]中国科学院成都山地灾害与环境研究所,成都610041

出　　处：《核技术》2009年第2期119-122,共4页Nuclear Techniques

基　　金：国家自然科学基金(40871017);中国科学院山地灾害与地表过程重点实验室开放基金联合资助

摘　　要：用热释光研究了云南小江流域蒋家沟现代泥石流物质热释光信号的变化。样品包括物源区倒石堆风化物(5个样)、通过区堆积物(3个样)、堆积区表碛层(12个样)。测试结果显示:由于阳光晒褪情况不同,释光矿物在泥石流发生过程中热释光信号的强度有明显的衰退;堆积区表碛层12个样的泥石流物质似是2次泥石流形成的,其剩余等效剂量相差很大,其中13–19号样是泥石流物质堆积时晒褪较充分的一段。研究显示释光测年可用于泥石流的断代。Changes in thermoluminescence signals from debris flow substance were studied. Samples were collected from Jiangjia valley, Xiaojiang drainage, Yunnan province. They include talus weathering product of the origin substance （five samples）, cumulus substance of transition area （three samples） and surface moraine of accumulative area （12 samples）. The results indicated that the weak and degenerate of the TL signals in the debris process was obviously. Samples 13-19 are supposed to be bleached enough by the sun light. This study showed that TL could be used for dating the debris flow event.

关 键 词：热释光 泥石流 蒋家沟 

分 类 号：TL824[核科学技术—核技术及应用]