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甘孜黄土细颗粒石英热转移光释光(TT-OSL)法测年可行性初探

张克旗

张克旗, 2013. 甘孜黄土细颗粒石英热转移光释光(TT-OSL)法测年可行性初探. 地质力学学报, 19 (3): 287-294.
引用本文: 张克旗, 2013. 甘孜黄土细颗粒石英热转移光释光(TT-OSL)法测年可行性初探. 地质力学学报, 19 (3): 287-294.
ZHANG Ke-qi, 2013. A PRELIMINARY DISCUSSION ON FEASIBILITY USING THERMALLY TRANSFERRED OPTICALLY STIMULATED LUMINESCENCE (TT-OSL) METHOD TO DATE THE FINE-GRAIN QUARTZ EXTRACTED FROM GANZI LOESS. Journal of Geomechanics, 19 (3): 287-294.
Citation: ZHANG Ke-qi, 2013. A PRELIMINARY DISCUSSION ON FEASIBILITY USING THERMALLY TRANSFERRED OPTICALLY STIMULATED LUMINESCENCE (TT-OSL) METHOD TO DATE THE FINE-GRAIN QUARTZ EXTRACTED FROM GANZI LOESS. Journal of Geomechanics, 19 (3): 287-294.

甘孜黄土细颗粒石英热转移光释光(TT-OSL)法测年可行性初探

基金项目: 

中国地质调查局地质调查项目 1212011120163

中国地质科学院地质力学研究所基本科研业务费项目 DZLXJK201202

详细信息
    作者简介:

    张克旗(1973-), 男, 助理研究员, 主要从事第四纪地质与环境及释光测年研究。E-mail:zhkeqi@163.com

  • 中图分类号: P597

A PRELIMINARY DISCUSSION ON FEASIBILITY USING THERMALLY TRANSFERRED OPTICALLY STIMULATED LUMINESCENCE (TT-OSL) METHOD TO DATE THE FINE-GRAIN QUARTZ EXTRACTED FROM GANZI LOESS

  • 摘要: 使用一种新的光释光测年法——热转移光释光(TT-OSL)法对甘孜县城附近的甘孜-A剖面上的黄土细颗粒石英进行实验测试,以探讨该方法用于其测年的可行性。实验测试结果表明,样品的天然回授OSL(ReOSL)信号强度随地层深度增加而增大,表现出明显的积累。利用“替换点”分析方式对TT-OSL法的检验表明该方法能够用于甘孜黄土的测年。采用简单多片法(SMAR)和TT-OSL法分别对3个样品进行等效剂量(De)测试及年龄计算,结果显示TT-OSL法得到的De值及年龄明显大于简单多片法,但TT-OSL法年龄与前人磁性地层研究中的期望年龄相差比较大。研究初步认为,TT-OSL法可以对甘孜黄土进行测年,但是结果的可靠性还需要有更多的可信独立年龄验证。

     

  • 图  1  不同埋深样品的第一秒天然ReOSL信号强度

    Figure  1.  Natural ReOSL signal intensity of the samples with different depths at the first second

    图  2  3个样品的TT-OSL再生剂量生长曲线

    Figure  2.  TT-OSL regenerated dose growth curves of the three samples

    图  3  “替换点”分析法简单示意图

    Figure  3.  Aschematic representation of the procedure used for the 'replacement plot' analysis

    图  4  “替换点”分析法计算结果

    Figure  4.  Results of the 'replacement plot' analysis

    表  1  TT-OSL法测量流程

    Table  1.   TT-OSL protocol process

    表  2  三个样品SMAR法和TT-OSL法De值及环境剂量率和年龄

    Table  2.   De values and ages of SMAR and TT-OSL protocols for the three samples

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出版历程
  • 收稿日期:  2013-04-02
  • 刊出日期:  2013-09-01

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