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Stable Isotope Geochemistry

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Subject:
From:
Greg Michalski <[log in to unmask]>
Reply To:
Stable Isotope Geochemistry <[log in to unmask]>
Date:
Mon, 29 Nov 2004 19:16:35 -0800
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Is anyone familiar with the sulfate 18O analysis technique of Van Stepvoort
and Krouse?  In the literature Ive found discussions about SiO2/V2O5
conversion to SO2.  Im assuming the oxygens are all exchanged during this
reaction and this is the means to get the 34S number, but its unclear where
the 18O numbers are coming from.  Im assuming its graphite reduction to CO2
or CO but I can not find that explicitly stated in any of the papers.  Are
there any references to the 18O aspect other than Van Stepvoort's PhD thesis?

Greg Michalski
Stable Isotope Lab, 5108 Urey Hall
University of California, San Diego
9500 Gilman Dr.
La Jolla, Ca. 92093-0356
858-534-6053

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