新疆昆仑山北坡风成沉积物TT-OSL测年可行性初探  

A FEASIBILITY STUDY ON TT-OSL DATING FOR THE EOLIAN SEDIMENTS FROM NORTHERN SLOPE OF KUNLUN MOUNTAINS,XINJIANG

作　　者：张克旗[1] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081

出　　处：《地质力学学报》2012年第4期425-432,共8页Journal of Geomechanics

基　　金：中国地质科学院地质力学研究所基本科研业务费项目(DZLXJK201109和DZLXJK200806)

摘　　要：对来自新疆昆仑山北坡于田克里雅河—皮山县一带的4个风成样品的细颗粒石英进行了热转移光释光法(TT-OSL)测试,以探讨该方法应用于该区域风成沉积测年的可行性。测试结果表明,这4个样品的TT-OSL信号均十分微弱,信噪比偏低,致使感量校正后的天然和再生剂量TT-OSL信号强度点散乱,难以拟合出高质量和高可靠性的生长曲线,因而也很难计算出一个可靠的De值。经研究后初步认为,TT-OSL法无法对新疆昆仑山北坡风成堆积物进行可靠的测年。The feasibility of TT-OSL dating for the eolian sediments at northern slope of Kunlun Mountains was discussed in this paper. The four samples were collected in Keriya River to Pishan County, southern Xinjiang. The measurement results showed that the intensity of TT-OSL signals were very weak, which meant a low signal-to-noise ratio resulting in the sensitive points of the corrected natural and regenerated TT-OSL signals being too scattered to fit a growth curve with high quality and reliability. Therefore a credible Do will be not calculated. The paper thought that TTOSL dating for the eolian sediments at northern slope of Kunlun Mountains, Xinjiang couldn＇t be reliably achieved.

关 键 词：OSL测年 TT-OSL法 风成沉积 昆仑山北坡 

分 类 号：P597[天文地球—地球化学]