云南东川地区达朵台地泥石流释光测年研究  

The Research of Daduo Platform Debris Flow Sediment Dating Using TL Method,Dongchuan Yunnan

作　　者：赵秋月[1] 魏明建[1] 周锐[1] 宋波[1] 张彬[1] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048

出　　处：《核电子学与探测技术》2012年第9期1108-1111,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金资助项目(40871017);北京市自然科学基金资助项目(8102013);北京市教委科技计划基金重点资助项目(KZ200810028015)

摘　　要：采用RGD-3B热释光仪对达朵泥石流堆积台地进行研究,以单片再生剂量法测定其剖面样品的等效剂量值(E.D.),结果表明:达朵台地剖面随深度的增加,埋藏时间增加,接受周围环境U、Th、K等的辐射剂量增多,等效剂量值总体上呈上升趋势,范围为92.91～155.38 Gy。说明采用热释光技术对古泥石流堆积台地进行年龄测定是可行的。确定达朵台地堆积时的年龄范围,对于云南小江流域划分泥石流活动期次、第四纪地层以及年代学标尺的建立具有基础性意义,同时为古泥石流堆积台地这种事件性的环境记录载体测年提供了一种新的思路和方法。The debris flow deposits of Daduo platform was studied using RGD 3B thermoluminescence spec trometer. Single aliquot regenerative dose method was utilized to measure the equivalent dose （ E. D. ） of the profile samples, the result indicates that with the increasing of depth and burial time , the acceptance of the surrounding environment of U, Th, K radiation dose increased , the overall equivalent dose values rise largely, range of 92.91 -155.38Gy. It shows that the using of thermoluminescence to date the ancient debris flow de posits samples on the platform technology has some viability. Determine the age range of Daduo platform has a basic significance in dividing the stages of debris flow activity and establishing chronological scale. At the same time TL dating provides the ancient debris flow deposits of the platform which is an event dating environmental record carrier with a new way of thinking and methods.

关 键 词：热释光 达朵台地 泥石流 

分 类 号：TL824[核科学技术—核技术及应用]