北京清水河流域现代稀性泥石流物质选频释光特性

采用BG2003释光谱仪对北京清水河流域达摩沟、西北山沟的稀性泥石流物质选频释光特性进行研究,并将其与云南蒋家沟流域现代粘性泥石流物质进行比较。研究表明:北京清水河流域泥石流物质样品受热激发后,290nm、310nm、400nm、480nm释光响应最为明显。储能电子主要源自的能级为4.28eV、4.00eV、3.50eV、2.58eV。用532nm绿光激发后,310nm、480nm释光响应最为明显,相应的储能电子主要源自的能级为4.00eV、2.58eV。采用选频释光技术能够区分清水河流域和蒋家沟流域的泥石流物质。该事实对进一步探索采用选频释光技术进行泥石流断代及泥石流物源识别具有基础性意义。

Selected frequency luminescence characteristics for modern turbulent debris flow materials in Qingshui River Basin,Beijing

The selected frequency luminescence characteristics of turbulent debris flow materials of Damo Gully and Xibei Mount Gully were studied using BG2003 luminescence spectrograph,which was compared with the debris flow materials collected in Jiangjia gully basin,Yunnan.The result indicates that the luminescence response of the debris flow samples collected from the Qingshui River basin is obvious at the wavelengths of 290 nm,310 nm,400 nm and 480 nm by thermal stimulating.Energy storage electron mainly originates from the energy levels of 4.28 eV,4.00 eV,3.50 eV and 2.58 eV.The luminescence reponse is obvious at the wavelengths of 310 nm and 480 nm by 532 nm green optical stimulation.The relevant energy storage electron mainly originates from the energy levels of 4.00 eV and 2.58 eV.The luminescence spectrogram can be used in distinguishing the debris flow from the Qingshui River Basin and Jiangjia Valley.It is significant to conduct further studies on utilizing selected frequency luminescence technology to dating debris flow materials and distinguishing the source of the materials.