A FEASIBILITY STUDY ON TT-OSL DATING FOR THE EOLIAN SEDIMENTS FROM NORTHERN SLOPE OF KUNLUN MOUNTAINS, XINJIANG
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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。Abstract: 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 De will be not calculated. The paper thought that TT-OSL dating for the eolian sediments at northern slope of Kunlun Mountains, Xinjiang couldn't be reliably achieved.
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Key words:
- OSL dating /
- TT-OSL /
- protocol eolian sediments /
- northern slope of Kunlun Mountains
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图 1 采样位置图
1—国道；2—主要河流；3—次要河流；4—季节性河；5—山峰及海拔；6—市、县；7—乡、镇、村；8—采样位置及样品编号
Figure 1. The map of sampling site
图 2 研究区4个样品的天然OSL信号、TT-OSL信号和BT-OSL信号衰减曲线
Figure 2. Decay curves of natural OSL, TT-OSL and BT-OSL signals of the four samples in the study area
图 3 研究区4个样品感量校正后天然及再生ReOSL信号强度
Figure 3. Intensity of natural and regenerated ReOSL signals of the four samples in the study area
表 1 研究区4个样品SMAR法De值
Table 1. The De by SMAR method for the four samples in the study area
表 2 TT-OSL法测量流程步骤
Table 2. Measurement procedures of TT-OSL method
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