HIGH-PRECISION SPATIALLY RESOLVED ANALYSIS OF DELTA-34-S IN SULFIDES USING A LASER EXTRACTION TECHNIQUE

被引：107

作者：

KELLEY, SP

FALLICK, AE

机构：

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1990年 / 54卷 / 03期

关键词：

D O I：

10.1016/0016-7037(90)90381-T

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Laser extraction of SO2 from natural sulphide minerals provides a high precision, spatially resolved technique for δ34S analysis. Precision of better than 0.25%. (1σ) can be achieved and a resolution of 0.25 mm during our experiments was limited by the sample size required by the mass spectrometer. Sulphur isotopes ( 34S 32S) were fractionated by between 0 and 8%. during laser combustion. Fractionation is related to the metal/sulphur bond strength; it is thus mineral specific and reproducible. Analysis of a galena vein 25 mm wide is discussed to illustrate the advantages offered by this technique. © 1990.

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页码：883 / 888

页数：6

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