水成沉积物释光测年研究进展与展望
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摘要
石英光释光(OSL)测年方法对于蕴藏着丰富区域气候环境变迁、古洪水、古地震及构造信息的冲积、洪积、湖积等水成沉积物组成的沉积地层,面临许多难题。水成沉积物矿物颗粒在搬运和沉积过程中,先前积存的释光信号能否被晒退,晒退是否均匀?残留水平如何?如何准确测定这些沉积物的天然释光信号强度的等效剂量(De)?环境剂量率怎样才能准确测定等问题,是几十年来国内外释光测年研究者普遍关注的问题。本文通过对水成沉积物研究成果的梳理、存在问题及研究现状分析,探讨了光释光测年方法在水成沉积物方面的应用前景。
OSL dating method has been widely used for dating sediments,most of which are wind-laid.There are many difficulties to use OSL dating method for dating water-laid deposits,such as alluvial,fluvial and lacustrine deposits,which need more chronological data support and contain abundant information of regional climate and environment change,ancient flood,ancient earthquake and geological structure.Therefore,application of the OSL dating method in water-laid deposits has been baffled to some extent.Can optical signal preserved in mineral particles of water-laid deposits be bleached in the process of transportation and deposition? Is that bleaching even? How is the residual level? How to determine the equivalent dose of nature optical signal intensity of the water-laid deposits? How to mensurate the equivalent dose accurately? These are decades-long problems concerned by OSL dating researchers home and abroad.In this paper,progresses in this field of research are reviewed,the recent research status and problems are discussed,and prospect of applying the OSL dating method to water-laid deposits is given.
OSL dating method has been widely used for dating sediments,most of which are wind-laid.There are many difficulties to use OSL dating method for dating water-laid deposits,such as alluvial,fluvial and lacustrine deposits,which need more chronological data support and contain abundant information of regional climate and environment change,ancient flood,ancient earthquake and geological structure.Therefore,application of the OSL dating method in water-laid deposits has been baffled to some extent.Can optical signal preserved in mineral particles of water-laid deposits be bleached in the process of transportation and deposition? Is that bleaching even? How is the residual level? How to determine the equivalent dose of nature optical signal intensity of the water-laid deposits? How to mensurate the equivalent dose accurately? These are decades-long problems concerned by OSL dating researchers home and abroad.In this paper,progresses in this field of research are reviewed,the recent research status and problems are discussed,and prospect of applying the OSL dating method to water-laid deposits is given.
引文
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5 An Z S,Porter S,Zhou W J,et al.Quaternary Res,1993,39:45–54
6孙继敏,尹功明,陈杰,等.中国沙漠,1997,17(1):1–8 SUN Jimin,YIN Gongming,CHEN Jie,et al.J Desert Res,1997,17(1):1–8
7 Berger G W,Busacca A J.J Geophysical Res,1995,100:22361–22374
8 Zhou L P,Wintle A G.Quaternary Sci Rev,1994,13:457–463
9 Huntley D J,Hutton J T,Prescott J R.Quaternary Sci Rev,1993,12:1–20
10 Huntley D J,Hutton J T,Prescott J R.Quaternary Sci Rev,1994,13:201–207
11 Baray M M,Zoller L.Quaternary Geochronology,1994,13:477–480
12 Berger G W,Can J.Earth Sci,1990,27:1737–1745
13 Berger G W,Burkeb R M,Carverb G A,et al.Chem Geol(Isotope Geoscience Section),1991,87:21–37
14 Page K,Nanson G,Price D J.Quat Sci,1996,11:311–326
15 Dutkiewicz A,Prescott J R.Quaternary Sci Rev,1997,16:367–385
16 Forman S L,Ennis G.Geophys Res Lett,1991,18:1727–1730
17 Huntley D J,Godfrey-Smith D I,Thewall M L W.Nature,1985,313:105–107
18 Godfrey-Smith D I,Huntley D J,Chen W-H.Quaternary Sci Rev,1988,7:373–380
19 Stokes S.Quaternary Sci Rev,1992,11:153–159
20 Aitken M J,Xie J.Quaternary Sci Rev,1992,11:147–152
21 Wintle A G,Li S H,Botha G A S.African J Sci,1993,89:77–82
22 Wintle A G,Li S H,Botha G A,et al.The Holocene,1995,5:97–102
23 Clarke M L,Botha G A,Wintle A G,et al.In abstracts of the 8th international conference on luminescence and electron spin resonance dating,1996.178–179
24 Mejdahl V,Funder S.Boreas,1994,23:525–535
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26 Lang A,Wagner G A.Quaternary Sci Rev,1997,16:393–396
27 Olley J,Caitcheon G,Murray A.Quaternary Sci Rev,1998,17:1033–1040
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29 Jain M,Murray A S,Botter-Jensen L.Quaternaire,2004,15(1–2):143–157
30 Stokes S,Bray H E,Blum M D.Quaternary Sci Rev,2001,20:879–885
31 Murray A S,Olley J M,Caitcheon G G.Quaternary Geochronology,1995,14:365–371
32 Fuchs M,Lang A.Quaternary Sci Rev,2001,20:783–787
33 Fuchs M,Fischer M,Reverman R.Quaternary Geochronology,2010,5:269–273
34 Lepper K,McKeever S W S.Radiat Prot Dosim,2002,101(1–4):349–352
35 Woda C,Fuchs M.Radiat Meas,2008,43:26–37
36 Lang A,Mauz B.Quaternary Sci Rev,2006,25:2666–2675
37 Rodnight H,Duller G A T,Wintle A G,et al.Quaternary Geochronology,2006,1:109–120
38 Olley J M,Pietsch T,Roberts R G.Geomorphology,2004,60:337–358
39陈杰,卢演俦,尹功明,等.高校地质学报,1996,2(4):390–399 CHEN Jie,LU Yanchou,YING Gongming,et al.Geol J China Univ,1996,2(4):390–399
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42 ZHANG J F,ZHOU L P,YUE S Y.Quaternary Sci Rev,2003,22:1123–1129
43 HU Gang,ZHANG Jiafu,QIU Weili,et al.Quaternary Geochronology,2010,5:187–193
44 ZHENG Yinger,ZHOU Liping,ZHANG Jiafu.Quaternary Geochronology,2010,5:228–232
45 WANG Xilong,LU Yanchou.Quaternary Geochronology,2006,1:89–100
46 ZHAO Hua,LU Yanchou,WANG Chengming,et al.Quaternary Geochronology,2010,5:159–163
47 Tsukamoto S,Duller G A T,Wintle A G.Radiat Meas,2008,43:1204–1218
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