Dear Greg and others,
to complete the references about isotopic analysis of S and O in sulfate:
Sakai, H.. Sulfate-water isotope thermometry applied to geothermal systems.
Geothermics (1977), 5(1-4), 67-74.
SCOPE 43 - Stable Isotopes: Natural and Anthropogenic Sulphur in the
H.R. Krouse & V.A. Grinenko eds., 1991, 466 pp, Wiley, U.K. (out of print???
Dipartimento di Scienze della Terra - UniversitÓ di Parma
(Earth Sciences Department - University of Parma)
Parco Area delle Scienze 157a
43100 Parma, ITALY
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----- Original Message -----
From: "Pier de Groot" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 30, 2004 4:41 PM
Subject: Re: [ISOGEOCHEM] sulfate 18O
> Bob and Greg,
> Is described in the Sakai and Krouse (1971) paper, with a good and
> explanatory picture of the structure. Ref given in my former message.
> > Greg, cannot find that paper at this time but when Van Stempvort
> > was at Waterloo, he used carbon mixed with sulphate wrapped in a
> > platinum or molybdenum foil between two electrodes that induced
> > high temp reaction to form CO/CO2. The CO was converted to CO2
> > in an arc between two platinum electrodes.
> > This design was in thesis by Shakur at Krouse's lab in Calgary and
> > the system was copied at Waterloo.
> > Bob
> > Date sent: Mon, 29 Nov 2004 19:16:35 -0800
> > Send reply to: Stable Isotope Geochemistry
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> > From: Greg Michalski <[log in to unmask]>
> > Subject: sulfate 18O
> > To: [log in to unmask]
> >> Is anyone familiar with the sulfate 18O analysis technique of Van
> >> and Krouse? In the literature Ive found discussions about SiO2/V2O5
> >> conversion to SO2. Im assuming the oxygens are all exchanged during
> >> reaction and this is the means to get the 34S number, but its unclear
> >> the 18O numbers are coming from. Im assuming its graphite reduction to
> >> or CO but I can not find that explicitly stated in any of the papers.
> >> there any references to the 18O aspect other than Van Stepvoort's PhD
> >> Greg Michalski
> >> Stable Isotope Lab, 5108 Urey Hall
> >> University of California, San Diego
> >> 9500 Gilman Dr.
> >> La Jolla, Ca. 92093-0356
> >> 858-534-6053