全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

光释光测年基本流程

DOI: 10.11820/dlkxjz.2013.05.001, PP. 683-693

Keywords: 采样与实验室流程,等效剂量测定的SAR-SGC法,光释光测年技术,石英中颗粒法

Full-Text   Cite this paper   Add to My Lib

Abstract:

光释光测年是对沉积物上一次曝光事件年代的测定.自20世纪80年代该方法提出以来,得到了越来越广泛的应用.相对于14C测年,光释光测年虽存在误差偏大的不足(一般5%~10%),但是具有以下明显优势①其测年年限范围比前者大得多;②测年物质(石英或长石)丰富,这在干旱半干旱区的沙漠和湖泊中尤其重要,因为在这些地区很难找到可用于14C测年的有机质;③是对沉积物的直接定年;④测年事件包括曝光、受热(400℃以上)、火山、地震和晶体(方解石等)形成等.本文介绍了光释光测年的整个实验过程,包括采样、前处理、等效剂量测定、年剂量测定等,以期让有需要的地学同行了解这一方法,尤其是了解从地层或岩芯等取样的过程中应注意的事项.重点介绍单片再生剂量法(SAR)与标准生长曲线法(SGC)相结合测定等效剂量的实验方法(我们命名为SAR-SGC法).该方法能大大提高仪器的使用效率,可节省仪器时间60%以上.通过氟硅酸溶蚀长石来提取石英的中颗粒(38~63μm)的前处理过程简便易行,获得的石英纯度高,且可以避免使用危险的氢氟酸.中国科学院青海盐湖研究所释光测年实验室近几年应用SAR-SGC法对黄土、沙漠、湖泊、海洋、冰川、考古点等各种类型沉积物进行光释光测年,都获得了很好的结果.

References

[1]  Aitken M J. 1998. An introduction to optical dating. Oxford: Oxford University Press.
[2]  Bailey R M, Sokes S, Bray H. 2003. Inductively-Coupled Plasma Mass Spectrometry(ICP-MS) for dose rate determination: some guidelines for sample preparation and analysis.Ancient TL, 21(1): 11-15.
[3]  Cao G C, Long H, Zhang J, et al. 2012. Quartz OSL dating of last glacial sand dunes near Lanzhou on the western Chinese Loess Plateau: A comparison between different granulometric fractions. Quaternary Geochronology, 10(3): 32-36.
[4]  Chen G Q, Yi L, Xu X Y, et al. 2013. Practical testing to the standardized growth curve(SGC) in quartz optically stimulated luminescence dating for marine sediments from the south Bohai Sea, China. Geochronometria, 40: 101-112.
[5]  E C Y, Lai Z P, Sun Y J, et al. 2012. A luminescence dating study of loess deposits from the Yili River Basin in western China. Quaternary Geochronology, 10(3): 50-55.
[6]  Fan Q S, Lai Z P, Long H, et al. 2010. OSL chronology for lacustrine sediments recording high stands of Gahai Lake in Qaidam Basin, northeastern Qinghai-Tibetan Plateau.Quaternary Geochronology, 5(2-3): 223-227.
[7]  Lai Z P, Wintle A G, Thomas D S G. 2007b. Rates of dust deposition between 50 ka and 20 ka revealed by OSL dating at Yuanbao on the Chinese Loess Plateau. Palaeogeography, Palaeoclimatology, Palaeoecology, 248(3-4): 431-439.
[8]  Lai Z P. 2008. Locating and dating the boundaries of MIS 2/1 and 3/2 in Chinese loess using luminecence techinique.
[9]  Quaternary Sciences, 28(5): 883-891. [赖忠平. 2008. 基 于光释光测年的中国黄土中氧同位素阶段2/1 和3/2 界 限位置及年代的确定. 第四纪研究, 28(5): 883-891.]
[10]  Lai Z P, Bruckner H. 2008a. Effects of feldspar contamination on equivalent dose and the shape of growth curve for OSL of silt-sized quartz extracted from Chinese loess.Geochronometria, 30: 49-53.
[11]  Lai Z P, Bruckner H, Fulling A, et al. 2008b. Effects of thermal treatment on the growth curve shape for OSL of quartz extracted from Chinese loess. Radiation Measurements, 43(2-6): 763-766.
[12]  Lai Z P. 2010. Chronology and the upper dating limit for loess samples from Luochuan section in the Chinese Loess Plateau using quartz OSL SAR protocol. Journal of Asian Earth Sciences, 37(2): 176-185.
[13]  Lai Z P, Zhang W G, Chen X, et al. 2010. OSL chronology of loess deposits in East China and its implications for East Asian monsoon history. Quaternary Geochronology, 5 (2-3): 154-158.
[14]  Lai Z P, Mischke S, Madsen D. 2013. Paleoenvironmental implications of new OSL dates on the formation of the "Shell Bar" in the Qaidam Basin, northeastern Qinghai- Tibetan Plateau. Journal of Paleolimnology(inpress). doi: 10.1007/s10933-013-9710-1.
[15]  Liu K, Lai Z P. 2012. Chronology of Holocene sediments from the archaeological Salawusu site in the Mu Us Desert in China and its palaeoenvironmental implications.Journal of Asian Earth Sciences, 45: 247-255.
[16]  Long H, Lai Z P, Frenzel P, et al. 2012b. Holocene moist period recorded by the chronostratigraphy of a lake sedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau. Quaternary Geochronology, 10(3): 136-142.
[17]  Madsen D, Lai Z P, Sun Y J, et al. 2013. Late Quaternary Qaidam lake histories and implications for an MIS 3"Greatest Lakes" period in northwest China. Journal of Palaeolimnology( inpress). doi:10.1007/s10933-012-9662-x.
[18]  Wintle A G, Murray A S. 2006. A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols. Radiation Measurements, 41(4): 369-391.
[19]  Yang L H, Zhou J, Lai Z P, et al. 2010. Lateglacial and Holocene dune evolution in the Horqin dunefield of northeastern China based on luminescence dating. Palaeogeography, Palaeoclimatology, Palaeoecology, 296(1-2): 44-51.
[20]  Yang L H, Lai Z P, Long H, et al. 2011. Construction of a quartz OSL standardised growth curve (SGC) for aeolian samples from the Horqin dunefield in Northeastern China.Geochronometria, 38(4): 391-396.
[21]  Yang L H, Wang T, Zhou J, et al. 2012. OSL chronology and possible forcing mechanisms of dune evolution in the Horqin dunefield in northern China since the Last Glacial Maximum. Quaternary Research, 78(2): 185-196.
[22]  Yi L, Lai Z P, Yu H J, et al. 2012. Chronologies of sedimentary changes in the south Bohai Sea, China: Constraints from luminescence and radiocarbon dating. Boreas, 42 (2): 267-284.
[23]  He Z, Zhou J, Lai Z P, et al. 2010. Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desert in northern China. Quaternary Geochronology, 5(2-3): 102-106.
[24]  Hou G L, Lai Z P, Sun Y J, et al. 2012. Luminescence and radiocarbon chronologies for the Xindian Culture site of Lamafeng in the Guanting Basin on the NE edge of the Tibetan Plateau. Quaternary Geochronology, 10(3): 394-398.
[25]  Huntley D J, Prescott J R. 2001. Improved methodology and new thermoluminescence ages for the dune sequence in south-east South Australia. Quaternary Science Reviews, 20(5-9): 687-699.
[26]  Jia Y L, Lai Z P, Zhang J R, et al. 2012. Chronology and provenance of aeolian sediments from Poyang Lake area in the middle reaches of the Yangtze River in China. Quaternary Geochronology, 10(3): 44-49.
[27]  Kaiser K, Lai Z P, Schneider B, et al. 2010. Late Pleistocene genesis of the middle Yarlung Zhangbo Valley, southern Tibet(China), as deduced by sedimentological and luminescence data. Quaternary Geochronology, 5(2): 200-204.
[28]  Lai Z P. 2006. Testing the use of an OSL Standardised Growth Curve(SGC) for De determination on quartz from the Chinese Loess Plateau. Radiation Measurements, 41(1): 9-16.
[29]  Lai Z P, Bruckner H, Zoller L, et al. 2007a. Existence of a common growth curve for silt-sized quartz OSL of loess from different continents. Radiation Measurements, 42 (9): 1432-1440.
[30]  Lai Z P, Zoller L, Fuchs M, et al. 2008c. Alpha efficiency determination for OSL of quartz extracted from Chinese loess. Radiation Measurements, 43(2-6): 767-770.
[31]  Liu X J, Lai Z P, Fan Q S, et al. 2010. Timing for high lake levels of Qinghai Lake in the Qinghai-Tibetan Plateau since the Last Interglaciation based on quartz OSL dating.Quaternary Geochronology, 5(2-3): 218-222.
[32]  Liu X J, Lai Z P, Madsen D, et al. 2011. Lake level variations of Qinghai Lake in northeastern Qinghai-Tibetan Plateau since 3.7 ka based on OSL dating. Quaternary International, 236: 57-64.
[33]  Liu X J, Lai Z P, Yu L P, et al. 2012. Luminescence chronology of aeolian deposits from the Qinghai Lake area in the Northeastern Qinghai-Tibetan Plateau and its palaeoenvironmental implications. Quaternary Geochronology, 10 (3): 37-43.
[34]  Long H, Lai Z P, Fan Q S, et al. 2010. Applicability of a quartz OSL standardised growth curve for De determination up to 400 Gy for lacustrine sediments from the Qaidam Basin of the Qinghai-Tibetan Plateau. Quaternary Geochronology, 5(2-3): 212-217.
[35]  Long H, Lai Z P, Fuchs M, et al. 2012a. Timing of Late Quaternary palaeolake evolution in Tengger Desert of northern China and its possible forcing mechanisms. Global and Planetary Change, 92-93: 119-129.
[36]  Murray A S, Wintle A G. 2000. Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol.Radiation Measurements, 32(1): 57-73.
[37]  Murray A S, Wintle A G. 2003. The single aliquot regenerative dose protocol: Potential for improvements in reliability.Radiation Measurements, 37(4-5): 377-381.
[38]  Ou X J, Xu L B, Lai Z P, et al. 2010. Potential of quartz OSL dating on moraine deposits from eastern Tibetan Plateau using SAR protocol. Quaternary Geochronology, 5(2-3): 257-262.
[39]  Ou X J, Lai Z P, Zeng L H, et al. 2012. OSL dating of glacial sediments from the Qinghai-Tibetan Plateau and its bordering mountains: A review and methodological suggestions.Journal of Earth Environment, 3(2): 829-842.
[40]  Prescott J, Hutton J. 1994. Cosmic ray contributions to dose rates for luminescence and ESR dating: Large depths and long-term time variations. Radiation Measurements, 23 (2-3): 497-500.
[41]  Roberts H, Duller G A T. 2004. Standardised growth curves for optical dating of sediment using multiple-grain aliquots.Radiation Measurements, 38(2): 241-252.
[42]  Seong Y B, Kang H C, Ree J H, et al. 2011. Geomorphic constraints on active mountain growth by the lateral propagation of fault-related folding: A case study on Yumu Shan, NE Tibet. Journal of Asian Earth Sciences, 41(2): 184-194.
[43]  Stevens T, Armitage S J, Lu H Y, et al. 2007. Examining the potential of high sampling resolution OSL dating of Chinese loess. Quaternary Geochronology, 2(1-4): 15-22.
[44]  Sun Y J, Lai Z P, Long H, et al. 2010. Quartz OSL dating of archaeological sites in Xiao Qaidam Lake of the NE Qinghai- Tibetan Plateau and its implication for palaeoenvironmental changes. Quaternary Geochronology, 5(2-3): 360-364.
[45]  Sun Y J, Lai Z P, Madsen D, et al. 2012. Luminescence dating of a hearth from the archaeological site of Jiangxigou in the Qinghai Lake area of the northeastern Qinghai-Tibetan Plateau. Quaternary Geochronology, 10(3): 107-110.
[46]  Telfer M W, Bateman M D, Carr A S, et al. 2008. Testing the applicability of a standardized growth curve(SGC) for quartz OSL dating: Kalahari dunes, South African coastal dunes and Florida dune cordons. Quaternary Geochronology, 3(1-2): 137-142.
[47]  Yu L P, Lai Z P. 2012. OSL chronology and palaeoclimatic implications of aeolian sediments in the eastern Qaidam Basin of the northeastern Qinghai-Tibetan Plateau. Palaeogeography, Palaeoclimatology, Palaeoecology, 337-338: 120-129.
[48]  Zhang B, Ou X J, Lai Z P. 2012. OSL ages revealing the glacier retreat in the Dangzi valley in the eastern Tibetan Plateau during the Last Glacial Maximum. Quaternary Geochronology, 10(3): 244-249.
[49]  Zhang J F, Zhou L P, Yao S C, et al. 2007. Radiocarbon and optical dating of lacustrine sediments: A case study in Lake Gucheng. [张家富, 周力平, 姚书春, 等. 2007. 湖泊 沉积物的14C和光释光测年: 以固城湖为例. 第四纪研 究, 27(4): 522-528.]
[50]  Zhang J R, Jia Y L, Lai Z P, et al. 2011. Holocene evolution of Huangqihai Lake in semi-arid northern China based on sedimentology and luminescence dating. The Holocene, 21: 1261-1268.
[51]  Zhang J R, Lai Z P, Jia Y L, et al. 2012. Luminescence chronology for late Quaternary lake levels of enclosed Huangqihai Lake in East Asian monsoon marginal area in northern China. Quaternary Geochronology, 10(3) : 123-128.
[52]  Zhao J D, Lai Z P, Liu S Y, et al. 2012. OSL and ESR dating of glacial deposits and its implications for glacial landform evolution in the Bogeda Peak area, Tianshan range, China. Quaternary Geochronology, 10(3): 237-243.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133