大别—苏鲁超高压榴辉岩中Pb同位素分析的实验技术研究

林森; 张利; 贾望鲁

Volume 28 Issue 2

Mar. 2003

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Article Navigation > Earth Science > 2003 > 28(2): 137-142

LIN Sen, ZHANG Li, JIA Wang-lu, 2003. Pb Isotopic Analysis Technique of Eclogite from Dabie-Sulu Orogenic Belt. Earth Science, 28(2): 137-142.

Citation:

LIN Sen, ZHANG Li, JIA Wang-lu, 2003. Pb Isotopic Analysis Technique of Eclogite from Dabie-Sulu Orogenic Belt. Earth Science, 28(2): 137-142.

LIN Sen, ZHANG Li, JIA Wang-lu, 2003. Pb Isotopic Analysis Technique of Eclogite from Dabie-Sulu Orogenic Belt. Earth Science, 28(2): 137-142.

Citation:

LIN Sen, ZHANG Li, JIA Wang-lu, 2003. Pb Isotopic Analysis Technique of Eclogite from Dabie-Sulu Orogenic Belt. Earth Science, 28(2): 137-142.

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Pb Isotopic Analysis Technique of Eclogite from Dabie-Sulu Orogenic Belt

1.
Faculty of Earth Sciences, China U niversity of Geosciences, Wuhan 430074, China
2.
Guangz hou Institute of Geochemistry, Chinese Academy of Sciences, Guangz hou 510640, China

Received Date: 2002-04-23
Publish Date: 2003-03-25

Abstract

Abstract

Pb isotopes have been comprehensively applied to isotopic geochronology, geochemical tracing and division of tectonic zones. Due to the difficulty for calibration of Pb isotopic fractionation in thermal ionization mass spectrometry (TIMS) analysis, the accurate determination of Pb isotopic ratios, especially for low-Pb samples, is generally difficult. This paper reports the preparation of samples with low-Pb contents, process of TIMS analysis and confect of emission reagent for accurate Pb isotope analysis. The role of emission reagent and affect of interferential elements on the Pb isotope analysis are also discussed. Some typical eclogites from Dabie-Sulu ultrahigh-pressure metamorphic belt are analyzed with this method. During the whole analysis process, the interior precision and exterior precision for the standard sample NBS981 are better than 0.25×10^-3 and 0.4×10^-3 respectively, and the relative error is 0.1×10^-3 to 0.9×10^-3 compared with the recommended values. The precision for eclogite Pb isotopic analysis is better than 0.25×10^-3.
- eclogite,
- Pb isotope analysis,
- experimental technique

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钟增球教授、高山教授为本实验研究提供了所需榴辉岩样品, 在此表示感谢.

References(13)

References

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