SEISMOLOGY AND GEOLOGY ›› 2010, Vol. 32 ›› Issue (2): 320-326.DOI: 10.3969/j.issn.0253-4967.2010.02.015

• Brief Report • Previous Articles     Next Articles

PRELIMINARY STUDY OF RE-OSL ON WATER-DEPOSITED SEDIMENTS

JI Hong-lei1, ZHAO Hua1,2, WANG Cheng-min1, MAO Hong-liang1, LU Yan-chou2   

  1. 1. Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang 050061, China;
    2. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China
  • Received:2009-11-09 Revised:2010-04-05 Online:2010-06-29 Published:2010-09-01

水成沉积物回授光释光测年可行性初探

纪洪磊1, 赵华1,2, 王成敏1, 毛洪亮1, 卢演俦2   

  1. 1. 中国地质科学院水文地质环境地质研究所, 石家庄, 050061;
    2. 中国地震局地质研究所, 地震动力学国家重点实验室, 北京, 100029
  • 通讯作者: 赵华,研究员,E-mail: zhaohua65@163.com。
  • 作者简介:纪洪磊,男,1984年生,硕士研究生,现就读于中国地质科学院水文地质环境地质研究所,研究方向为释光年代学,电话:0311-88020738,E-mail:jhl0543@163.com.
  • 基金资助:
    中国地质科学院水文地质环境地质研究所基本科研业务费项目(SK07011,SK200907)资助

Abstract: According to measuring the natural TT-OSL signals of the fine-grained quartz from both fluvial and lacustrine sediments,the dose recovery experiment and the comparison of the multiple aliquots fine-grained quartz SMAR and Re-OSL dating results,the possibility of Re-OSL dating with fine-grained quartz for water-deposited sediments has been studied.The results show that,the Re-OSL signals accumulated in the fine-grained quartz from fluvial sediments are lack of regularity with the depth,and the Re-OSL signals of the fine-grained quartz can not yield the dose values;While the Re-OSL signals of the lacustrine sediments increase gradually with the depth.The Re-OSL dose measured and laboratory additional dose are consistent within 2%error range,which indicates that the Re-OSL dating with the fine-grained quartz for lacustrine sediments is feasible to some range of time.The Re-OSL dating method has much potential for dating the lacustrine samples more than 100ka years.

Key words: water-deposited sediments, fine-grained quartz, TT-OSL, Re-OSL

摘要: 通过对滹沱河冲洪积物、阳原盆地湖相地层细颗粒石英天然热转移光释光(TT-OSL)信号测量、回授剂量恢复测试以及简单多片光释光(OSL)与回授光释光(Re-OSL)测量结果对比等,探讨了细颗粒石英回授光释光在水成沉积物测年中应用的可能性。结果表明,冲积样品回授光释光信号没有随深度逐步增加的规律,而湖相样品热转移光释光信号随深度逐渐增大;冲洪积物细颗粒石英样品回授光释光不能得出剂量值,剂量不能恢复;而湖相样品回授实验室附加剂量与测得的剂量在2%的误差范围内一致,说明回授光释光测年在一定时间范围内对于湖相样品测年是可行的;细颗粒石英回授释光在测量>10万a的湖相样品年龄方面具有很大的潜力。

关键词: 水成沉积物, 细颗粒石英, 热转移光释光, 回授光释光

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