High precision spatially resolved analysis of 34 S in sulphides using a laser extraction technique

Details High precision spatially resolved analysis of 34 S in sulphides using a laser extraction technique High precision spatially resolved analysis of 34 S in sulphides using a laser extraction technique

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54..883k&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 54, Issue 3, pp.883-888

Physics

10

Scientific paper

Laser extraction of SO 2 from natural sulphide minerals provides a high precision, spatially resolved technique for 34 S analysis. Precision of better than 0.25%. (1 ) 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 ( 34 S / 32 S ) 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.

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