暴露测年样品中~(26)Al和~(10)Be分离及其加速器质谱测定
The Extraction of in-situ ~(10)Be and ~(26)Al from Rock Sample and Accelerator Mass Spectrometric Measurements
查看参考文献32篇
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文摘
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在已有实验流程基础上,建立并优化了石英样品中Be和Al提取、纯化等实验流程,设计的流程条件实验包括实验试剂、器皿和离子交换柱选择、离子交换树脂分离Be和Al时酸浓度选择等。结果表明,选择钢铁研究总院研制的~9Be标准溶液作为~(10)Be样品制备的载体;使用一次性实验器皿;选用4 cm规格的离子交换柱;用0.05 mol/L草酸和0.75 mol/L盐酸混合溶液洗脱吸附于阴离子树脂上的Al,可有效提取、纯化样品中的Be和Al。加速器质谱(AMS)测量结果显示,13组化学空白的~(10)Be/~9Be和~(26)Al/~(27)Al比值平均值分别为7.48×10~(-15)和1.96×10~(-15),与国内已有宇宙成因核素实验室的结果(5×10~(-15)~8×10~(-15))具有可比性。电感耦合等离子体发射光谱(ICP-AES)的测量结果表明,Be、Al回收率分别达90%和60%。基于新建立的实验流程分析了祁连山北侧金佛寺的一个岩石样品,获得了~(10)Be和~(26)Al的暴露年代分别为(10.7±1.0)ka和(10.0±1.2)ka,与前人研究结果一致。 |
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其他语种文摘
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With the development of accelerator mass spectrometry,a variety of long-lived cosmogenic nuclides,especially the in-situ cosmogenic nuclides ~(10)Be and ~(26)Al,are increasingly applied to earth sciences.Based on published procedures,a modified procedure for ~(10)Be and ~(26)Al exposure dating has been developed,which includes ~(10)Be and ~(26)Al extraction,anion exchange column separation,purification and target preparation.In this procedure,NCS ~9Be was chosen instead of Merck and Fluka as the carrier for the ~(10)Be sample,with a small amount of ion exchange resin instead of a large one.In particular,the elution curve for an anion exchange column procedure by Purdue University was modified as 0.05 mol/L H_2C_2O_4-0.75 mol/L HCl to elute Al.The results of Accelerator Mass Spectrometry(AMS) show that the average for ~(10)Be/~9Be and ~(26)Al/~(27)Al of thirteen chemical blanks were 7.48×10~(-15) and 1.96×10~(-15),respectively,as low as those of other AMS laboratories.The ICP-AES results indicated the recoveries of Be and Al were 90% and 60%,respectively.One sample from Jinfosi Site,North of Qilian Shan Mountain,was tested based on this new procedure.The dating results of(10.7±1.0) ka for ~(10)Be and(10.0±1.2) ka for ~(26)Al,were consistent with published geological results. |
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来源
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岩矿测试
,2012,31(1):83-89 【扩展库】
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关键词
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原地宇宙成因核素
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~(10)Be
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~(26)Al
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暴露测年
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加速器质谱
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地址
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中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 陕西, 西安, 710075
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0254-5357 |
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学科
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化学 |
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基金
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国家973计划
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国家自然科学基金项目
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文献收藏号
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CSCD:4440217
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参考文献 共
32
共2页
|
|
1.
Lal D. Comic ray produced radioactivity on earth.
Engyclopedia ofPhysics, Cosmic Rays Ⅱ.,1967:551-612
|
被引
1
次
|
|
|
|
|
2.
Gosse J C. Terrestrial in situ cosmogenicnuclides:Theory and application.
QuaternaryScience Reviews,2001,20:1475-1560
|
被引
105
次
|
|
|
|
|
3.
Kong P. Moraine dam related to late Quaternary glaciation in the YulongMountains,southwest China,and impacts on the JinshaRiver.
Quaternary Science Reviews,2009,28:3224-3235
|
被引
19
次
|
|
|
|
|
4.
Shen G J. Age of Zhoukoudian Homo erectus determined with ~(26)Al /~(10)Be burial dating.
Nature,2009,458:198-200
|
被引
24
次
|
|
|
|
|
5.
Ivy-Ochs S. Latest Pleistocene and Holocene glacier variations in the European Alps.
QuaternaryScience Reviews,2009,28:2137-2149
|
被引
5
次
|
|
|
|
|
6.
Jiang S. Development of AMS measurements and applications at the CIAE..
Nuclear Instruments andMethods in Physics Research Section B,2000,172(1/2):87-90
|
被引
15
次
|
|
|
|
|
7.
Kong P. Erosion in northwest Tibet from in-situ-produced cosmogenic ~(10)Be and ~(26)Al in bedrock.
Earth Surface Processes and Landforms Volume,2007,32(1):116-125
|
被引
24
次
|
|
|
|
|
8.
Ballantyne C K. Exposure dating andreinterpretation of coarse debris accumulations (‘rock glaciers’) in the Cairngorm Mountains,Scotland.
Journal of Quaternary Science,2009,24:19-31
|
被引
1
次
|
|
|
|
|
9.
Li Y K. Cosmogenic nuclide constraints on glacial chronology in the source area of the Urumqi River,TianShan,China.
Journal of Quaternary Science,2011,26(3):297-304
|
被引
13
次
|
|
|
|
|
10.
Kong P. Late Quaternary glaciation of the Tianshan, Central Asia, using cosmogenic 10Be surface exposure dating.
Quaternary Research,2009,72(2):229-233
|
被引
17
次
|
|
|
|
|
11.
Kong P. Late Miocene ice sheet elevation in the GroveMountains, East Antarctica, inferred from cosmogenic~(21)Ne-~(10)Be-~(26)Al..
Global and Planetary Change,2010,72(1/2):50-54
|
被引
9
次
|
|
|
|
|
12.
Rood D H. Chronology of glaciations in the Sierra Nevada,California,from 10Besurface exposure dating.
Quaternary ScienceReviews,2011,30(5/6):646-661
|
被引
6
次
|
|
|
|
|
13.
Kim K J. In situ cosmogenic nuclideproduction of ~(10)Be and ~(26)Al in marine terraces, Fiordland,New Zealand.
Nuclear Instruments andMethods in Physics Research Section B,2004,223/224:639-644
|
被引
1
次
|
|
|
|
|
14.
顾兆炎. 怒江峡谷构造地貌的演化：阶地宇宙成因核素定年的初步结果.
第四纪研究,2006,26(2):293-294
|
被引
25
次
|
|
|
|
|
15.
Rixhon G. Quaternary river incision in NE Ardennes (Belgium) —Insights from ~(10)Be /~(26)Al dating of riverterraces.
Quaternary Geochronology,2011,6(2):273-284
|
被引
4
次
|
|
|
|
|
16.
Kong P. Cosmogenic ~(10)Be inferred lake-level changes in Sumxi Co basin,Western Tibet.
Journal of Asian EarthSciences,2007,29(5/6):698-703
|
被引
9
次
|
|
|
|
|
17.
Kong P. Cosmogenic ~(10)Be and ~(26)Al dating ofpaleolake shorelines in Tibet.
Journal of Asian EarthSciences,2011,41(3):263-273
|
被引
8
次
|
|
|
|
|
18.
吕延武. 内蒙古额济纳盆地戈壁~(10)Be暴露年龄与洪积作用的演化.
科学通报,2010,27(Z2):2719-2727
|
被引
1
次
|
|
|
|
|
19.
周卫健. 西安加速器质谱中心多核素分析的加速器质谱仪.
核技术,2007,30(8):702-708
|
被引
9
次
|
|
|
|
|
20.
Zhou W J. New results on Xi'an-AMS and sample preparation systems at Xi' an-AMS center.
Nuclear Instruments and Methods in PhysicsResearch Section B,2007,262:135-142
|
被引
13
次
|
|
|
|
|
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