高精度质谱计在同位素地球化学的应用前景

被引：32

作者：

陈福坤

李秋立

李潮峰

李向辉

王秀丽

王芳

机构：

[1] 中国科学院地质与地球物理研究所固体同位素地球化学实验室

来源：

地球科学 | 2005年 / 06期

关键词：

质谱计; 高精度; 低本底; 年代学; 同位素地球化学;

D O I：

暂无

中图分类号：

P597 [同位素地质学与地质年代学];

学科分类号：

摘要：

微量地质样品的高精度同位素比值测试已经成为地质和环境科学等领域极其重要的研究手段.新型固体热电离质谱计以其高精度和高灵敏度,将在同位素年代学和地球化学领域有广阔的应用前景.报道采用IsoProbeT质谱计测量标准物质溶液的结果.测量锶标准物质NBS987和钕标准物质Ames分别获得平均87Sr/86Sr比值0.7102418±0.0000051和平均143Nd/144Nd比值0.5121484±0.0000029,内部精度可达0.0003%.微量锶标准物质(0.3～1ng)的同位素比值测量内部精度可以优于0.003%.结合低本底化学流程,实现了微量地质样品的高精度同位素比值测试.这一结合将有效地促进单颗粒矿物年代学和同位素示踪在岩浆岩、变质岩、矿床、构造岩研究的应用.

引用

页码：639 / 645

页数：7

共 10 条

[1] Pb isotopic zoning of K-feldspar megacrysts determined by Laser Ablation Multi-Collector ICP-MS: Insights into granite petrogenesis[J] . D. Gagnevin,J.S. Daly,T.E. Waight,D. Morgan,G. Poli.Geochimica et Cosmochimica Acta . 2005 (7)
[2] Sm–Nd and Rb–Sr isotopic chronology and cooling history of ultrahigh pressure metamorphic rocks and their country rocks at Shuanghe in the Dabie Mountains, Central China[J] . Shuguang Li,Emil Jagoutz,Yizhi Chen,Qiuli Li.Geochimica et Cosmochimica Acta . 2000 (6)
[3] Fingerprinting feldspar phenocrysts using crystal isotopic composition stratigraphy: implications for crystal transfer and magma mingling in S-type granites[J] . Tod E. Waight,Roland Maas,Ian A. Nicholls.Contributions to Mineralogy and Petrology . 2000 (2)
[4] Zircon ages and Nd isotopic and chemical compositions of orthogneisses from the Black Forest, Germany: evidence for a Cambrian magmatic arc[J] . F. Chen,E. Hegner,W. Todt.International Journal of Earth Sciences . 2000 (4)
[5] A new microtome for cutting hard submillimeter-sized crystalline objects for promoting high-resolution instrumental microanalysis
Sergeev, SA
Komarov, AN
Bickel, RA
Steiger, RH
[J]. EUROPEAN JOURNAL OF MINERALOGY, 1997, 9 (02) : 449 - 456
[6] The issue of the terrestrial record of 146 Sm[J] . M. Sharma,D.A. Papanastassiou,G.J. Wasserburg,R.F. Dymek.Geochimica et Cosmochimica Acta . 1996 (11)
[7] A study of complex discordance in zircons using step-wise dissolution techniques[J] . James M. Mattinson.Contributions to Mineralogy and Petrology . 1994 (1)
[8] Single-zircon evaporation combined with Pb + emitter bedding for 207 Pb/ 206 Pb-age investigations using thermal ion mass spectrometry, and implications to zirconology[J] . Bernd Kober.Contributions to Mineralogy and Petrology . 1987 (1)
[9] Whole-grain evaporation for 207 Pb/ 206 Pb-age-investigations on single zircons using a double-filament thermal ion source[J] . Bernd Kober.Contributions to Mineralogy and Petrology . 1986 (4)
[10] Pb, U and Th diffusion in nature zircon .2 J. Lee,I. Williams,D. Ellis. Nature . 1997

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